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RESEARCH ARTICLE

Reproductive ecology of the witch guitarfish Zapteryx xyster Jordan & Evermann, 1896 (Chondrichtyes: Trygonorrhinidae) in the Gulf of Tehuantepec, Mexican Pacific

A. M. Torres-Huerta A E , E. Cruz-Acevedo A , P. E. Carrasco-Bautista A , J. F. Meraz-Hernando A , E. J. Ramírez-Chávez B , M. Tapia-García C and A. Gracía D F
+ Author Affiliations
- Author Affiliations

A Instituto de Recursos, Universidad del Mar, Ciudad Universitaria s/n, Puerto Ángel, San Pedro Pochutla, CP 70902, Oaxaca, Mexico.

B Instituto de Ecología, Universidad del Mar, Ciudad Universitaria s/n, Puerto Ángel, San Pedro Pochutla, CP 70902, Oaxaca, Mexico.

C Departamento de Hidrobiología, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Colonia Vicentina, CP 09340, Mexico City, Mexico.

D Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, CP 04510, Mexico City, Mexico

E Present address: Facultad de Ciencias, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, CP 04510, Mexico City, Mexico.

F Corresponding author. Email: gracia@unam.mx

Marine and Freshwater Research 71(7) 844-854 https://doi.org/10.1071/MF19072
Submitted: 3 March 2019  Accepted: 23 August 2019   Published: 14 November 2019

Abstract

From January 2008 to December 2009, 451 specimens of witch guitarfish Zapteryx xyster were caught in the Gulf of Tehuantepec. Total weight, total length (TL), sex, maturity stage and catch depth were recorded for each specimen. Maturity stage distribution exhibited significant differences with respect to depth. The data indicated that adults migrated towards shallow waters (25–37 m) to reproduce, starting in February. Males reached maturity at 44 cm TL, whereas females reached maturity at 48 cm TL. Witch guitarfish females are synchronous; therefore, ovulation and mating begin in March and parturition begins in April. Females showed a 2-year cycle with consecutive vitellogenesis and gestation. Fecundity was five to eight embryos (mean six embryos) and the sex ratio of embryos was 1 : 1. Birth occurred in April and May, with an average size at parturition of 17.3 cm TL. There was sexual dichromatism between males and females during the breeding period, and sexual polymorphism in adult females. The incidental catch of the witch guitarfish during courtship and mating threatens the survival of this species.

Additional keywords: batoids, distribution, reproduction, sexual dichromatism.


References

Acal, D. E., and Arias, A. (1990). Evaluación de los recursos demerso pelágicos vulnerables a redes de arrastre de fondo en el sur del pacífico de México. Ciencias Marinas 16, 93–129.
Evaluación de los recursos demerso pelágicos vulnerables a redes de arrastre de fondo en el sur del pacífico de México.Crossref | GoogleScholarGoogle Scholar |

Acero, A., Grijalba-Bendeck, M., Moreno, F., Acevedo, K., and González, E. (2008). Histología comparada del sistema reproductivo de cuatro especies de rayas caribeñas (Chondrichtgyes: Batoidea). Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales XXXII, 581–596.

Andersson, M. (1986). Evolution of condition-dependent sex ornaments and mating preferences: sexual selection based on viability differences. Evolution 40, 804–816.
Evolution of condition-dependent sex ornaments and mating preferences: sexual selection based on viability differences.Crossref | GoogleScholarGoogle Scholar | 28556175PubMed |

Barton, E. D., Argote, M. L., Brown, J., Kosro, P. M., Lavin, M., Robles, J. M., Smith, R. L., Trasvifia, A., and Velez, H. S. (1993). Supersquirt: dynamics of the Gulf of the Tehuantepec, Mexico. Oceanography (Washington, D.C. 6, 23–30.
Supersquirt: dynamics of the Gulf of the Tehuantepec, Mexico.Crossref | GoogleScholarGoogle Scholar |

Blackburn, M. (1962). An oceanographic study of the Gulf of Tehuantepec. Special Scientific Report – Fisheries, Vol. 404, US Department of the Interior, Fish and Wildlife Service, Washington DC, USA.

Blanco-Parra, M. P., Márquez-Farías, J. F., and Galván-Magaña, F. (2009). Reproductive biology of the banded guitarfish, Zapteryx exasperata, from the Gulf of California, México. Journal of the Marine Biological Association of the United Kingdom 89, 1655–1662.
Reproductive biology of the banded guitarfish, Zapteryx exasperata, from the Gulf of California, México.Crossref | GoogleScholarGoogle Scholar |

Carrier, J. C., Harold, L., Pratt, J., and Martin, L. K. (1994). Group reproductive behaviors in free-living nurse sharks, Ginglymostoma cirratum. Copeia 1994, 646–656.
Group reproductive behaviors in free-living nurse sharks, Ginglymostoma cirratum.Crossref | GoogleScholarGoogle Scholar |

Castillo-Páez, A., Sandoval-Castillo, J., Corro-Espinosa, D., Tovar-Ávila, J., Blanco-Parra, M. P., Saavedra-Sotelo, N. C., Sosa-Nishizaki, O., Galvan-Magaña, F., and Rocha-Olivares, A. (2017). Cutting through the Gordian knot: unravelling morphological, molecular, and biogeographical patterns in the genus Zapteryx (guitarfish) from the Mexican Pacific. ICES Journal of Marine Science 74, 1630–1638.
Cutting through the Gordian knot: unravelling morphological, molecular, and biogeographical patterns in the genus Zapteryx (guitarfish) from the Mexican Pacific.Crossref | GoogleScholarGoogle Scholar |

Castro, J. I. (2009). Observations on the reproductive cycles of some viviparous North American sharks. Aqua – International Journal of Ichthyology 15, 205–222.

Castro-Aguirre, J. L., and Espinosa-Pérez, H. (1996). ‘Catálogo sistemático de las rayas y especies afines de México (Chondrichthyes: Elasmobranchii: Rajiformes: Batoideiomorpha).’ Listados faunísticos de México VII. (Universidad Nacional Autónoma de México: Mexico City, Mexico.)

Chapa-Balcorta, C., Hernandez-Ayon, J. M., Durazo, R., Beier, E., Alin, S. R., and López-Pérez, A. (2015). Influence of post-Tehuano oceanographic processes in the dynamics of the CO2 system in the Gulf of Tehuantepec, Mexico. Journal of Geophysical Research – Oceans 120, 7752–7770.
Influence of post-Tehuano oceanographic processes in the dynamics of the CO2 system in the Gulf of Tehuantepec, Mexico.Crossref | GoogleScholarGoogle Scholar |

Clarke, T. M., Espinoza, M., and Wehrtmann, I. S. (2014). Reproductive ecology of demersal elasmobranchs from a data-deficient fishery, Pacific of Costa Rica, Central America. Fisheries Research 157, 96–105.
Reproductive ecology of demersal elasmobranchs from a data-deficient fishery, Pacific of Costa Rica, Central America.Crossref | GoogleScholarGoogle Scholar |

Clarke, T. M., Espinoza, M., Ahrens, R., and Wehrtmann, I. S. (2016). Elasmobranch bycatch associated with the shrimp trawl fishery off the Pacific coast of Costa Rica, Central America. Fishery Bulletin 114, 1–17.
Elasmobranch bycatch associated with the shrimp trawl fishery off the Pacific coast of Costa Rica, Central America.Crossref | GoogleScholarGoogle Scholar |

Clarke, T. M., Espinoza, M., Chaves, R. R., and Wehrtmann, I. S. (2018). Assessing the vulnerability of demersal elasmobranchs to a data-poor shrimp trawl fishery in Costa Rica, Eastern Tropical Pacific. Biological Conservation 217, 321–328.
Assessing the vulnerability of demersal elasmobranchs to a data-poor shrimp trawl fishery in Costa Rica, Eastern Tropical Pacific.Crossref | GoogleScholarGoogle Scholar |

Colonello, J. C., García, M. L., and Menni, R. C. (2011). Reproductive biology of the lesser guitarfish Zapteryx brevirostris from the south-western Atlantic Ocean. Journal of Fish Biology 78, 287–302.
Reproductive biology of the lesser guitarfish Zapteryx brevirostris from the south-western Atlantic Ocean.Crossref | GoogleScholarGoogle Scholar | 21235561PubMed |

Cooper, W. E., and Greenberg, N. (1992). Reptilian coloration and behavior. In ‘Biology of the Reptilia’. (Ed. C. G. A. D. Crews.) Vol. 18, pp. 298–422. (University of Chicago Press: Chicago, IL, USA.)

Corro-Espinoza, D., and Ramos-Carrillo, S. (2004). ‘Guía para la identificación de las principales especies de rayas de México en el Océano Pacífico.’ (Secretaria de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación: Mexico City, Mexico.)

Cotton, S., Small, J., and Pomiankowski, A. (2006). Sexual selection and condition-dependent mate preferences. Current Biology 16, R755–R765.
Sexual selection and condition-dependent mate preferences.Crossref | GoogleScholarGoogle Scholar | 16950102PubMed |

Darwin, C. (1871). Sexual selection. In ‘The Descent of Man, and Selection in Relation to Sex’. pp. 253–384. (John Murray: London, UK.)

Dulvy, N. K., and Reynolds, J. D. (1997). Evolutionary transitions among egg-laying, live-bearing and maternal inputs in sharks and rays. Proceedings. Biological Sciences 264, 1309–1315.
Evolutionary transitions among egg-laying, live-bearing and maternal inputs in sharks and rays.Crossref | GoogleScholarGoogle Scholar |

Dulvy, N. K., Fowler, S. L., Musick, J. A., Cavanagh, R. D., Kyne, P. M., Kyne, M., Harrison, L. R., Carlson, J. K., Davidson, L. N. K., Fordham, S. V., Francis, M. P., Pollock, C. M., Simpfendorfer, C. A., Burgess, G. H., Carpenter, K. E., Compagno, L. J. V., Ebert, D. A., Gibson, C., Heupel, M. R., Livingstone, S. R., Sanciangco, J. C., Stevens, J. D., Valenti, S., and White, W. T. (2014). Extinction risk and conservation of the world’s sharks and rays. eLife 3, e00590.
Extinction risk and conservation of the world’s sharks and rays.Crossref | GoogleScholarGoogle Scholar | 24448405PubMed |

Eayrs, S. (2007). ‘Guía para Reducir la Captura de Fauna Incidental (bycatch) en las Pesquerías por Arrastre de Camarón Tropical.’ (Food and Agriculture Organization of the United Nations: Rome, Italy.)

Ebert, D. A. (2003). ‘Sharks, Rays, and Chimaeras of California.’ (University of California Press: Berkeley, CA, USA.)

Ebert, D. A. (2005). Reproductive biology of skates, Bathyraja (Ishiyama), along the eastern Bering Sea continental slope. Journal of Fish Biology 66, 618–649.
Reproductive biology of skates, Bathyraja (Ishiyama), along the eastern Bering Sea continental slope.Crossref | GoogleScholarGoogle Scholar |

Economakis, A. E., and Lobel, P. S. (1998). Aggregation behavior of the grey reef shark, Carcharhinus amblyrhynchos, at Johnston Atoll, Central Pacific Ocean. Environmental Biology of Fishes 51, 129–139.
Aggregation behavior of the grey reef shark, Carcharhinus amblyrhynchos, at Johnston Atoll, Central Pacific Ocean.Crossref | GoogleScholarGoogle Scholar |

Eschmeyer, W. N., and Fong, J. D. (2019). Species by family/subfamily. In ‘Eschmeyer’s Catalog of Fishes’. (Eds R. Fricke, W. Eschmeyer, and J. D. Fong.) Available at http://researcharchive.calacademy.org/research/ichthyology/catalog/SpeciesByFamily.asp [Verified 11 February 2019].

Fernández-Álamo, M. A., and Färber-Lorda, J. (2006). Zooplankton and the oceanography of the eastern tropical Pacific: a review. Progress in Oceanography 69, 318–359.
Zooplankton and the oceanography of the eastern tropical Pacific: a review.Crossref | GoogleScholarGoogle Scholar |

Galán, P. (2000). Females that imitate males: dorsal coloration varies with reproductive stage in female Podarcis bocagei (Lacertidae). Copeia 2000, 819–825.
Females that imitate males: dorsal coloration varies with reproductive stage in female Podarcis bocagei (Lacertidae).Crossref | GoogleScholarGoogle Scholar |

Gallegos-García, A., and Barberán-Falcón, J. (1998). Surgencia eólica. In ‘El Golfo de Tehuantepec: el ecosistema y sus recursos’. (Ed. M. Tapia-Garcia.) pp. 27–34. (Universidad Autónoma Metropolitana-Iztapalapa: México City, Mexico.)

Gamboa-Contreras, J. A., and Tapia-García, M. (1998). Invertebrados bentónicos de la plataforma continental interna. In ‘El Golfo de Tehuantepec: El ecosistema y sus recursos’. (Ed. M. Tapia-García.) pp. 103–128. (Universidad Autónoma Metropolitana-Iztapalapa: Mexico City, Mexico.)

Heupel, M. R., Simpfendorfer, C. A., and Hueter, R. E. (2004). Estimation of shark home ranges using passive monitoring techniques. Environmental Biology of Fishes 71, 135–142.
Estimation of shark home ranges using passive monitoring techniques.Crossref | GoogleScholarGoogle Scholar |

Hight, B. V., and Lowe, C. G. (2007). Elevated body temperatures of adult female leopard sharks, Triakis semifasciata, while aggregating in shallow nearshore embayments: evidence for behavioral thermoregulation? Journal of Experimental Marine Biology and Ecology 352, 114–128.
Elevated body temperatures of adult female leopard sharks, Triakis semifasciata, while aggregating in shallow nearshore embayments: evidence for behavioral thermoregulation?Crossref | GoogleScholarGoogle Scholar |

Hoare, D. J., Krause, J., Peuhkuri, N., and Godin, J. G. J. (2000). Body size and shoaling in fish. Journal of Fish Biology 57, 1351–1366.
Body size and shoaling in fish.Crossref | GoogleScholarGoogle Scholar |

Hosmer, D. W., and Lemeshow, S. (2000). Introduction to the logistic regression model. In ‘Applied Logistic Regression’. (Eds N. A. C. Cressie, N. I. Fisher, I. M. Johnstone, J. B. Kadane, D. W. Scott, B. W. Silverman, A. F. M. Smith, J. L. Teugels, V. Barnett, R. A. Bradley, J. S. Hunter, and D. G. Kendall.) pp. 1–30. (Wiley: New York, NY, USA).

Jacoby, D. M. P., Croft, D. P., and Sims, D. W. (2012). Social behavior in sharks and rays: analysis, patterns and implications for conservation. Fish and Fisheries 13, 399–417.
Social behavior in sharks and rays: analysis, patterns and implications for conservation.Crossref | GoogleScholarGoogle Scholar |

Jordan, D. S., and Evermann, B. W. (1896). The fishes of North and Middle America: a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Bulletin of the United States National Museum 47, 64–65.

Klimley, A. P. (1980). Observations of courtship and copulation in the nurse shark, Ginglymostoma cirratum. Copeia 1980, 878–882.
Observations of courtship and copulation in the nurse shark, Ginglymostoma cirratum.Crossref | GoogleScholarGoogle Scholar |

Klimley, A. P. (1987). The determinants of sexual segregation in the scalloped hammerhead shark, Sphyrna lewini. Environmental Biology of Fishes 18, 27–40.
The determinants of sexual segregation in the scalloped hammerhead shark, Sphyrna lewini.Crossref | GoogleScholarGoogle Scholar |

Klimley, A. P., and Nelson, D. R. (1984). Diel movement patterns of the scalloped hammerhead shark (Sphyrna lewini) in relation to El Bajo Espiritu Santo: a refuging central-position social system. Behavioral Ecology and Sociobiology 15, 45–54.
Diel movement patterns of the scalloped hammerhead shark (Sphyrna lewini) in relation to El Bajo Espiritu Santo: a refuging central-position social system.Crossref | GoogleScholarGoogle Scholar |

Kock, A., O’Riain, M. J., Mauff, K., Meÿer, M., Kotze, D., and Griffiths, C. (2013). Residency, habitat use and sexual segregation of white sharks, Carcharodon carcharias in False Bay, South Africa. PLoS One 8, e55048.
Residency, habitat use and sexual segregation of white sharks, Carcharodon carcharias in False Bay, South Africa.Crossref | GoogleScholarGoogle Scholar | 23874668PubMed |

Kyne, P. M., Courtney, A. J., Jacobsen, I. P., and Bennett, M. B. (2016). Reproductive parameters of rhinobatid and urolophid batoids taken as by-catch in the Queensland (Australia) east coast otter-trawl fishery. Journal of Fish Biology 89, 1208–1226.
Reproductive parameters of rhinobatid and urolophid batoids taken as by-catch in the Queensland (Australia) east coast otter-trawl fishery.Crossref | GoogleScholarGoogle Scholar | 27238204PubMed |

Lara-Mendoza, R. E., and Márquez-Farías, J. F. (2014). Estructura de tallas y relación peso-longitud del pez guitarra pinta, Rhinobatos glaucostigma (Rajiformes: Rhinobatidae) en la plataforma continental de Sinaloa, México. Hidrobiológica 24, 119–127.

Last, P. R., and Séret, B. (2016). Family Trygonorrhinidae (banjo rays). In ‘Rays of the World’. (Eds P. R. Last, W. T. White, M. R. de Carvalho, B. Séret, M. F. W. Stehmann, and G. J. P. Naylor.) pp. 125–126. (CSIRO Publishing: Melbourne, Vic., Australia.)

Lavín, M. F., Robles, J. M., Argote, M. L., Barton, E. D., Smith, R., Brow, J., Koero, M., Trasviña, A., Vélez, H. S., and García, J. (1992). Física del Golfo de Tehuantepec. Ciencia y Desarrollo 18, 97–108.

Lucifora, L. O., Menni, R. C., and Escalante, A. H. (2002). Reproductive ecology and abundance of the sand tiger shark, Carcharias taurus, from the southwestern Atlantic. Journal of Marine Science 59, 553–561.

Mabragaña, E., Lucifora, L. O., and Massa, A. M. (2002). The reproductive ecology and abundance of Sympterygia bonapartii endemic to the south-west Atlantic. Journal of Fish Biology 60, 951–967.
The reproductive ecology and abundance of Sympterygia bonapartii endemic to the south-west Atlantic.Crossref | GoogleScholarGoogle Scholar |

Marshall, L. J., White, W. T., and Potter, I. C. (2007). Reproductive biology and diet of the southern fiddler ray, Trygonorrhina fasciata (Batoidea: Rhinobatidae), an important trawl bycatch species. Marine and Freshwater Research 58, 104–115.
Reproductive biology and diet of the southern fiddler ray, Trygonorrhina fasciata (Batoidea: Rhinobatidae), an important trawl bycatch species.Crossref | GoogleScholarGoogle Scholar |

McEachran, J. D., and Notarbarloto di Sciara, G. (1995). Peces Batoideos. In ‘Guía para la identificación de especies para los fines de la pesca, Pacífico Centro Oriental’. (Eds W. Fischer, F. Krupp, W. Schneider, C. Sommer, K. Carpenter, and V. Niem.) pp. 746–792. (Food and Agriculture Organization of the United Nations: Rome, Italy.)

Moore, A. B. M. (2017). Are guitarfishes the next sawfishes? Extinction risk and an urgent call for conservation action. Endangered Species Research 34, 75–88.
Are guitarfishes the next sawfishes? Extinction risk and an urgent call for conservation action.Crossref | GoogleScholarGoogle Scholar |

Mucientes, G. R., Queiroz, N., Sousa, L. L., Tarroso, P., and Sims, D. W. (2009). Sexual segregation of pelagic sharks and the potential threat from fisheries. Biology Letters 5, 156–159.
Sexual segregation of pelagic sharks and the potential threat from fisheries.Crossref | GoogleScholarGoogle Scholar | 19324655PubMed |

Musick, J. A. (1999). Ecology and conservation of long-lived marine animals. American Fisheries Society Symposium 23, 1–10.

Musick, J. A., and Ellis, J. K. (2005). Reproductive evolution of chondrichthyans. In ‘Reproductive Biology and Phylogeny of Chondrichthyes: Sharks, Batoids, and Chimaeras’. (Ed. W. C. Hamlett.) pp. 45–79. (Science Publishers: Enfield, NH, USA).

Oddone, M. C., and Velasco, G. (2006). Relationship between liver weight, body size and reproductive activity in Atlantoraja cyclophora (Elasmobranchii: Rajidae: Arhynchobatinae) in oceanic waters off Rio Grande do Sul, Brazil. Neotropical Biology and Conservation 1, 12–16.

Ortega-García, S., Trigueros-Salmerón, J. A., Rodríguez-Sánchez, R., Lluch-Cota, S., and Villalobos, H. (2000). El golfo de Tehuantepec como un centro de actividad biológica y su importancia en las pesquerías. In ‘BAC Centros de Actividad Biológica del Pacífico mexicano’. (Eds D. Lluch-Belda, J. Elorduy-Garay, S. E., and G. Ponce-Díaz.) pp. 335–354. (Centro de Investigaciones Biológicas del Noroeste, SC: Mexico City, México.)

Parsons, G. R., Hoffmaye, E. R., Frank, J., and Bet-Sayad, W. (2008). A review of shark reproductive ecology: life history and evolutionary implications. In ‘Fish Reproduction’. (Eds M. J. Rocha, A. Arukwe, and B. G, Kapoor.) pp. 435–469. (Science Publishers: Enfield, NH, USA.)

Pérez-Jiménez, J. C. (2011). Biología reproductiva de la raya Rhinoptera bonasus (Elasmobranchii) en el sureste del Golfo de México. Hidrobiológica 21, 159–167.

Powter, D. M., and Gladstone, W. (2009). Habitat-mediated use of space by juvenile and mating adult Port Jackson sharks, Heterodontus portusjacksoni, in Eastern Australia. Pacific Science 63, 1–14.
Habitat-mediated use of space by juvenile and mating adult Port Jackson sharks, Heterodontus portusjacksoni, in Eastern Australia.Crossref | GoogleScholarGoogle Scholar |

Rickers, W. E. (1975). Growth in length and in weight. In ‘Computation and Interpretation of Biological Statistics of Fish Populations’. (Ed. J. C. Stevenson.) Vol. 191, pp. 203–207. (Bulletin of the Fisheries Research Board of Canada: Ottawa, ON, Canada.)

Robbins, R. L. (2007). Environmental variables affecting the sexual segregation of great white sharks Carcharodon carcharias at the Neptune Islands South Australia. Journal of Fish Biology 70, 1350–1364.
Environmental variables affecting the sexual segregation of great white sharks Carcharodon carcharias at the Neptune Islands South Australia.Crossref | GoogleScholarGoogle Scholar |

Robertson, D. R., and Allen, G. R. (2015). Peces Costeros del Pacífico Oriental Tropical: sistema de informacion en linea. Versión 2.0. (Instituto Smithsonian de Investigaciones Tropicales: Balboa, República de Panamá.) Available at http://biogeodb.stri.si.edu/sftep/es/pages [Verified 14 July 2019].

Romero-Centeno, R., Zavala-Hidalgo, J., Gallegos, A., and O’Brien, J. J. (2003). Isthmus of Tehuantepec wind climatology and ENSO signal. Journal of Climate 16, 2628–2639.
Isthmus of Tehuantepec wind climatology and ENSO signal.Crossref | GoogleScholarGoogle Scholar |

Secretaría de Agricultura, Desarrollo Rural, Pesca y Alimentación (2013). Norma Oficial Mexicana NOM-002-SAG/PESC-2013, para ordenar el aprovechamiento de las especies de camarón en aguas de jurisdicción federal de los Estados Unidos Mexicanos. Diario Oficial de la Federación, Mexico City, Mexico.

Simpfendorfer, C. A., Hueter, R. E., Bergman, U., and Connett, S. M. H. (2002). Results of a fishery-independent survey for pelagic sharks in the western North Atlantic, 1977–1994. Fisheries Research 55, 175–192.
Results of a fishery-independent survey for pelagic sharks in the western North Atlantic, 1977–1994.Crossref | GoogleScholarGoogle Scholar |

Sims, D. W. (2003). Tractable models for testing theories about natural strategies: foraging behaviour and habitat selection of free-ranging sharks. Journal of Fish Biology 63, 53–73.
Tractable models for testing theories about natural strategies: foraging behaviour and habitat selection of free-ranging sharks.Crossref | GoogleScholarGoogle Scholar |

Sims, D. W. (2005). Differences in habitat selection and reproductive strategies of male and female sharks. In ‘Sexual Segregation in Vertebrates: Ecology of the Two Sexes’. (Eds K. E. Ruckstuhl and P. Neuhaus.) pp. 127–147. (Cambridge University Press: Cambridge, UK.)

Stevens, J. D., Bonfíl, R., Dulvy, N. K., and Walker, P. A. (2000). The effects of fishing on sharks, rays, and chimaeras (Chondrichthyans), and the implications for marine ecosystems ICES Journal of Marine Science 57, 476–494.
The effects of fishing on sharks, rays, and chimaeras (Chondrichthyans), and the implications for marine ecosystemsCrossref | GoogleScholarGoogle Scholar |

Tapia-García, M. (1998). Evaluación ecológica de la ictiofauna demersal. In ‘El Golfo de Tehuantepec: El ecosistema y sus recursos’. (Ed. M. Tapia-García.) pp. 129–148. (Universidad Autónoma Metropolitana-Iztapalapa: Mexico City, Mexico.)

Tapia-García, M., and García-Abad, M. C. (1998). Los peces acompañantes del camarón y su potencial como recurso en las costas de Oaxaca y Chiapas. In ‘El Golfo de Tehuantepec: El ecosistema y sus recursos’. (Ed. M. Tapia-García.) pp. 179–196. (Universidad Autónoma Metropolitana-Iztapalapa: Mexico City, Mexico.)

Torres-Huerta, A. M., López-Pérez, R. A., Gracia, A., and Tapia-García, M. (2019). Distribution of demersal assemblages of batoid fishes at the continental platform of the Gulf of Tehuantepec. Marine and Freshwater Research 70, 1445–1458.
Distribution of demersal assemblages of batoid fishes at the continental platform of the Gulf of Tehuantepec.Crossref | GoogleScholarGoogle Scholar |

Trasviña, A., and Barton, E. D. (1997). Los Nortes del Golfo de Tehuantepec: la circulación costera inducida por el viento. In ‘Contribuciones a la Oceanografía Física en México’. (Ed. M. F. Lavín.) pp. 25–46. (Unión Geofísica Mexicana: Ensenada, Mexico.)

Villavicencio-Garayzar, C. J. (1995). Biología reproductiva de la guitarra pinta, Zapterix exasperata (Pisces: Rhinobatidae), en Bahía Almejas, Baja California Sur, México. Ciencias Marinas 21, 141–153.
Biología reproductiva de la guitarra pinta, Zapterix exasperata (Pisces: Rhinobatidae), en Bahía Almejas, Baja California Sur, México.Crossref | GoogleScholarGoogle Scholar |

Waltrick, D., Awruch, C., and Simpfendorfer, C. (2012). Embryonic diapause in the elasmobranchs Reviews in Fish Biology and Fisheries 22, 849–859.
Embryonic diapause in the elasmobranchsCrossref | GoogleScholarGoogle Scholar |

Waltrick, D., Jones, S. M., Simpfendorfer, C. A., and Awruch, C. A. (2014). Endocrine control of embryonic diapause in the Australian sharpnose shark Rhizoprionodon taylori. PLoS One 9, e101234.
Endocrine control of embryonic diapause in the Australian sharpnose shark Rhizoprionodon taylori.Crossref | GoogleScholarGoogle Scholar | 24992673PubMed |

Wearmouth, V. J., and Sims, D. W. (2010). Sexual segregation in elasmobranchs. Biologia Marina Mediterranea 17, 236–239.

Whitney, N. M., Harold, L., Pratt, J., and Carrier, J. C. (2004). Group courtship, mating behaviour and siphon sac function in the whitetip reef shark, Triaenodon obesus. Animal Behaviour 68, 1435–1442.
Group courtship, mating behaviour and siphon sac function in the whitetip reef shark, Triaenodon obesus.Crossref | GoogleScholarGoogle Scholar |

Wyatt, T. D. (2014). On the scent of human attraction: human pheromones? In ‘Pheromones and Animal Behavior: Chemical Signals and Signature Mixtures’. pp. 276–304. (Cambridge University Press: New York, NY, USA.)