Near-term embryos and gravid females of Lusitanian cownose ray (Rhinoptera marginata) in Mersin Bay, eastern Mediterranean Sea
E. Mümtaz Tıraşın A C and Nuri Başusta B
+ Author Affiliations
- Author Affiliations
A Institute of Marine Sciences and Technology, Dokuz Eylül University, Inciralti, Balcova, TR-35340 Izmir, Turkey.
B Fisheries Faculty, Fırat University, TR-23119 Elazig, Turkey.
C Corresponding author. Email: mumtaz.tirasin@deu.edu.tr
Marine and Freshwater Research 69(9) 1365-1371 https://doi.org/10.1071/MF17356
Submitted: 25 November 2017 Accepted: 20 February 2018 Published: 29 May 2018
Abstract
Batoid chondrichthyans are vulnerable to commercial fisheries even though they are often not targeted. A greater understanding of their reproductive biology is important to facilitate their conservation. In February 2013, 89 female and 40 male Lusitanian cownose ray (Rhinoptera marginata) specimens were accidentally caught in Mersin Bay in the eastern Mediterranean Sea. Thirty-six fish were gravid, each bearing one embryo. Of the remaining females, 39 were sexually mature but not gravid and 14 were immature. There were 28 mature and 12 immature males. The average disc width (DW) of both mature females (80.2 cm) and males (74.2 cm) was significantly higher than that of immature females (60.7 cm) and males (60.3 cm). For all rays, DW and total weight (TW) were in the range 55.7–98.2 cm and 1802–13 600 g. The DW and TW measured for all 16 female and 20 male embryos were in the range 15.6–29.2 cm and 57–281 g. Such a large single haul sample, including many gravid specimens and mature males, indicates a schooling formation at capture. The location in Mersin Bay near the estuaries of the Tarsus and Seyhan rivers, and its relative closeness to the sampling location of a previously reported neonate, suggests that this region may be a nursery area for Lusitanian cownose rays in the eastern Mediterranean.
Additional keywords: nursery ground, reproduction biology, weight–length relationship.
References
Adams, K. R., Fetterplace, L. C., Davis, A. R., Taylor, M. D., and Knott, N. A. (2018). Sharks, rays and abortion: the prevalence of capture-induced parturition in elasmobranchs. Biological Conservation 217, 11–27.| Sharks, rays and abortion: the prevalence of capture-induced parturition in elasmobranchs.Crossref | GoogleScholarGoogle Scholar |
Ajemian, M. J., and Powers, S. P. (2016). Seasonality and ontogenetic habitat partitioning of cownose rays in the northern Gulf of Mexico. Estuaries and Coasts 39, 1234–1248.
| Seasonality and ontogenetic habitat partitioning of cownose rays in the northern Gulf of Mexico.Crossref | GoogleScholarGoogle Scholar |
Başusta, N., and Erdem, Ü. (2000). A study on the pelagic and demersal fishes in Iskenderun Bay. Turkish Journal of Zoology 24, 1–19.
Başusta, A., Ozer, E. I., Sulikowski, J. A., and Başusta, N. (2012a). First record of a gravid female and neonate of the Lusitanian cownose ray, Rhinoptera marginata, from the eastern Mediterranean Sea. Journal of Applied Ichthyology 28, 643–644.
| First record of a gravid female and neonate of the Lusitanian cownose ray, Rhinoptera marginata, from the eastern Mediterranean Sea.Crossref | GoogleScholarGoogle Scholar |
Başusta, A., Başusta, N., Sulikowski, J. A., Driggers, W. B., Demirhan, S. A., and Çiçek, E. (2012b). Length–weight relationships for nine species of batoids from the Iskenderun Bay, Turkey. Journal of Applied Ichthyology 28, 850–851.
| Length–weight relationships for nine species of batoids from the Iskenderun Bay, Turkey.Crossref | GoogleScholarGoogle Scholar |
Bertrand, J., Gil-de-Sola, L., Papakonstantinou, C., Relini, G., and Souplet, A. (2000). Contribution on the distribution of elasmobranchs in the Mediterranean (from the MEDITS surveys). Biologia Marina Mediterranea 7, 385–399.
Bizzarro, J. J., Smith, W. D., Márquez-Farías, J. F., and Hueter, R. E. (2007). Artisanal fisheries and reproductive biology of the golden cownose ray, Rhinoptera steindachneri Evermann and Jenkins, 1891, in the northern Mexican Pacific. Fisheries Research 84, 137–146.
| Artisanal fisheries and reproductive biology of the golden cownose ray, Rhinoptera steindachneri Evermann and Jenkins, 1891, in the northern Mexican Pacific.Crossref | GoogleScholarGoogle Scholar |
Bradai, M. N., Saidi, B., and Enajjar, S. (2012). Elasmobranchs of the Mediterranean and Black sea: status, ecology and biology. Bibliographic analysis. Studies and reviews. General Fisheries Commission for the Mediterranean, Number 91, FAO, Rome, Italy.
Capapé, C. (1993). New data on the reproductive biology of the thorny stingray, Dasyatis centroura (Pisces: Dasyatidae) from off the Tunisian coasts. Environmental Biology of Fishes 38, 73–80.
| New data on the reproductive biology of the thorny stingray, Dasyatis centroura (Pisces: Dasyatidae) from off the Tunisian coasts.Crossref | GoogleScholarGoogle Scholar |
Castro, J. I. (1993). The shark nursery of Bulls Bay, South Carolina, with a review of the shark nurseries of the southeastern coast of the United States. Environmental Biology of Fishes 38, 37–48.
| The shark nursery of Bulls Bay, South Carolina, with a review of the shark nurseries of the southeastern coast of the United States.Crossref | GoogleScholarGoogle Scholar |
Collins, A. B., Heupel, M. R., and Simpfendorfer, C. A. (2008). Spatial distribution and long-term movement patterns of cownose rays Rhinoptera bonasus within an estuarine river. Estuaries and Coasts 31, 1174–1183.
| Spatial distribution and long-term movement patterns of cownose rays Rhinoptera bonasus within an estuarine river.Crossref | GoogleScholarGoogle Scholar |
Compagno, L. J. V. (1984). Sharks of the world. An annotated and illustrated catalogue of shark species known to date. FAO Species Catalogue 125, Vol. 4, Part 1. FAO, Rome, Italy.
Cortés, E. (2000). Life history patterns and correlations in sharks. Reviews in Fisheries Science 8, 299–344.
| Life history patterns and correlations in sharks.Crossref | GoogleScholarGoogle Scholar |
Domingues, R. R., Gonzalez, M. M. B., and Amorim, A. F. (2009). First reported occurrence of pregnant and neonate, Rhinoptera brasiliensis (Chondrichthyes, Rhinopteridae) caught off Guaruja city, São Paulo state, Brazil. Pan-American Journal of Aquatic Sciences 4, 605–608.
Ebert, D. A., and Stehmann, M. F. W. (2013). Sharks, batoids, and chimaeras of the North Atlantic. FAO Species Catalogue for Fishery Purposes 7. FAO, Rome, Italy.
Fisher, R. A., Call, G. C., and Grubbs, R. D. (2013). Age, growth, and reproductive biology of cownose rays in Chesapeake Bay. Marine and Coastal Fisheries 5, 224–235.
| Age, growth, and reproductive biology of cownose rays in Chesapeake Bay.Crossref | GoogleScholarGoogle Scholar |
Fisher, R. A., Call, G. C., and McDowell, J. R. (2014). Reproductive variations in cownose rays (Rhinoptera bonasus) from Chesapeake Bay. Environmental Biology of Fishes 97, 1031–1038.
| Reproductive variations in cownose rays (Rhinoptera bonasus) from Chesapeake Bay.Crossref | GoogleScholarGoogle Scholar |
Frisk, M. G. (2010). Life history strategies of batoids. In ‘Sharks and Their Relatives II: Biodiversity, Adaptive Physiology, and Conservation’. (Eds J. F. Carrier, J. A. Musick, and M. R. Heithaus.) pp. 283–316. (CRC Press: London, UK.)
Golani, D., Öztürk, B., and Başusta, N. (2006). Fishes of the eastern Mediterranean. Publication Number 24, Turkish Marine Research Foundation, Istanbul, Turkey.
Goodman, M. A., Conn, P. B., and Fitzpatrick, E. (2011). Seasonal occurrence of cownose rays (Rhinoptera bonasus) in North Carolina’s estuarine and coastal waters. Estuaries and Coasts 34, 640–651.
| Seasonal occurrence of cownose rays (Rhinoptera bonasus) in North Carolina’s estuarine and coastal waters.Crossref | GoogleScholarGoogle Scholar |
Heithaus, M. R. (2007). Nursery areas as essential shark habitats: a theoretical perspective. American Fisheries Society Symposium 50, 3–13.
Heupel, M. R., Carlson, J. K., and Simpfendorfer, C. A. (2007). Shark nursery areas: concepts, definition, characterization and assumptions. Marine Ecology Progress Series 337, 287–297.
| Shark nursery areas: concepts, definition, characterization and assumptions.Crossref | GoogleScholarGoogle Scholar |
International Council for the Exploration of the Sea (2010). Report of the Workshop on Sexual Maturity Staging of Elasmobranches (WKMSEL), 11–15 October 2010, Valetta, Malta. ICES CM 2010/ACOM:48. (ICES: Copenhagen, Denmark.) Available at http://brage.bibsys.no/xmlui/handle/11250/102515 [Verified 23 November 2017].
James, P. S. B. R. (1970). Further observations on shoals of the Javanese cownose ray Rhinoptera javanica Müller and Henle from the Gulf of Mannar with additional notes on the species. Journal of the Marine Biological Association of India 12, 151–157.
Martin, L. K., and Cailliet, G. M. (1988). Aspects of the reproduction of the bat ray, Myliobatis californica, in central California. Copeia 1988, 754–762.
| Aspects of the reproduction of the bat ray, Myliobatis californica, in central California.Crossref | GoogleScholarGoogle Scholar |
McEachran, J. D., and Capapé, C. (1984). Rhinopteridae. In ‘Fishes of the North-eastern Atlantic and the Mediterranean’. (Eds P. J. P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen, and E. Tortonese.) Vol. 1, pp. 208–209. (UNESCO: Paris, France.)
McEachran, J. D., and Séret, B. (1990). Rhinopteridae. In ‘Check-list of the Fishes of the Eastern Tropical Atlantic (CLOFETA)’. (Eds J. C. Quero, J. C. Hureau, C. Karrer, A. Post, and L. Saldanha.) Vol. 1, pp. 71–72. (UNESCO: Paris, France.)
Neer, J. A., and Thompson, B. A. (2005). Life history of the cownose ray, Rhinoptera bonasus, in the northern Gulf of Mexico, with comments on geographic variability in life history traits. Environmental Biology of Fishes 73, 321–331.
| Life history of the cownose ray, Rhinoptera bonasus, in the northern Gulf of Mexico, with comments on geographic variability in life history traits.Crossref | GoogleScholarGoogle Scholar |
Notarbartolo di Sciara, G., Serena, F., Ducrocq, M., and Séret, B. (2009). Rhinoptera marginata (Lusitanian Cownose Ray). In ‘The IUCN Red List of Threatened Species’, Vol. 2009. (International Union for Conservation of Nature and Natural Resources.) Available at http://www.iucnredlist.org/details/161463/0 [Verified 23 November 2017].
Pérez-Jiménez, J. C. (2011). Reproductive biology of the cownose ray Rhinoptera bonasus (Elasmobranchii) in the Southeastern Gulf of Mexico. Hidrobiológica 21, 159–167.
Poulakis, G. R. (2013). Reproductive biology of the cownose ray in the Charlotte Harbor estuarine system, Florida. Marine and Coastal Fisheries 5, 159–173.
| Reproductive biology of the cownose ray in the Charlotte Harbor estuarine system, Florida.Crossref | GoogleScholarGoogle Scholar |
Quignard, J. P., and Tomasini, J. A. (2000). Mediterranean fish biodiversity. Biologia Marina Mediterranea 7, 1–66.
Rogers, C., Roden, C., Lohoefener, R., Mullin, K., and Hoggard, W. (1990). Behavior, distribution, and relative abundance of cownose ray schools Rhinoptera bonasus in the northern Gulf of Mexico. Northeast Gulf Science 11, 69–76.
Schwartz, F. J. (1990). Mass migratory congregations and movements of several species of cownose rays, Genus Rhinoptera: a world-wide review. Journal of the Elisha Mitchell Scientific Society 106, 10–13.
Serena, F. (2005). Field identification guide to the sharks and rays of the Mediterranean and Black Sea. FAO species identification guide for fishery purposes. FAO, Rome, Italy.
Smith, J. W., and Merriner, J. V. (1986). Observations on the reproductive biology of the Cownose Ray, Rhinoptera bonasus, in Chesapeake Bay. Fishery Bulletin 84, 871–877.
Smith, J. W., and Merriner, J. V. (1987). Age, growth, movements, and distribution of the cownose ray, Rhinoptera bonasus, in Chesapeake Bay. Estuaries 10, 153–164.
| Age, growth, movements, and distribution of the cownose ray, Rhinoptera bonasus, in Chesapeake Bay.Crossref | GoogleScholarGoogle Scholar |
Sokal, R. R., and Rohlf, F. J. (2012). ‘Biometry. The Principles and Practice of Statistics in Biological Research’, 4th edn. (W. H. Freeman: New York, NY, USA.)
Sparre, P., and Venema, S. C. (1992). Biostatistics. In ‘Introduction to Tropical Fish Stock Assessment’, FAO Fisheries Technical Papers 306/1, Part 1, Rev. 2, pp. 21–40. (FAO: Rome, Italy.)
Valadou, B., Brêthes, J., and Inejih, C. A. O. (2006). Observations biologiques sur cinq espèces d’Élasmobranches du Parc national du Banc d’Arguin (Mauritanie). Cybium 30, 313–322.
Vooren, C. M., and Lamónaca, A. F. (2004). Rhinoptera brasiliensis (Brazilian Cownose Ray). In ‘The IUCN Red List of Threatened Species’, Vol. 2004. (International Union for Conservation of Nature and Natural Resources.) Available at http://www.iucnredlist.org/details/44595/0 [Verified 23 November 2017].
White, W. T., and Sommerville, E. (2010). Elasmobranchs of tropical marine ecosystems. In ‘Sharks and Their Relatives II: Biodiversity, Adaptive Physiology, and Conservation’. (Eds J. F. Carrier, J. A. Musick, and M. R. Heithaus.) pp. 159–239. (CRC Press: London, UK.)
