First Estimates of Age and Growth of the Lusitanian Cownose Ray (<i>Rhinoptera marginata</i>) from the Mediterranean Sea
Within the eastern Mediterranean, increased fishing pressure coupled with a lack of basic biological information is threatening the sustainability of the rare Lusitanian cownose ray (<i>Rhinoptera marginata</i>). To provide baseline life-history data for this species, age estimates were...
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MDPI AG
2022-05-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/5/685 |
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| author | Nuri Başusta Asiye Başusta Erdoğan Çiçek Angela M. Cicia James A. Sulikowski |
| author_facet | Nuri Başusta Asiye Başusta Erdoğan Çiçek Angela M. Cicia James A. Sulikowski |
| author_sort | Nuri Başusta |
| collection | DOAJ |
| description | Within the eastern Mediterranean, increased fishing pressure coupled with a lack of basic biological information is threatening the sustainability of the rare Lusitanian cownose ray (<i>Rhinoptera marginata</i>). To provide baseline life-history data for this species, age estimates were obtained from vertebral band counts of 224 rays (size range: 210–998 mm disc width and 140 to 13,600 g weight) collected from Iskenderun Bay. Females ranged in size from 210 to 998 mm disc width and 238 to 13,600 g weight, while males ranged from 130 to 866 mm disc width and 140 to 8250 g weight. The index of average percent error (2.8%) and age-bias plot suggest that the aging method used represents a precise and non-biased approach. Marginal increment analysis indicated that a single opaque band is deposited annually between August and September. The oldest ages obtained for <i>R. marginata</i> were 9 years for males and 19 years for females, which corresponded to total lengths of 866 and 998 mm disc width, respectively. For males, limited samples prevented the accurate calculation of growth rates; however, for combined sexes, observed and disc width-at-age data resulted in the following von Bertalanffy growth parameters: <i>DW</i><sub>∞</sub> = 1102.16 mm, <i>k</i> = 0.148 and <i>t</i><sub>0</sub> = −0.2167. Although additional samples are necessary to determine growth rates in males, the results of the present study indicate that <i>R. marginata</i> females exhibit life history characteristics similar to other <i>Rhinoptera</i> species. |
| first_indexed | 2024-03-10T03:38:08Z |
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| language | English |
| last_indexed | 2024-03-10T03:38:08Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-e9f7346a800c43f09243ac9119b7cfef2023-11-23T11:40:19ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-05-0110568510.3390/jmse10050685First Estimates of Age and Growth of the Lusitanian Cownose Ray (<i>Rhinoptera marginata</i>) from the Mediterranean SeaNuri Başusta0Asiye Başusta1Erdoğan Çiçek2Angela M. Cicia3James A. Sulikowski4Faculty of Fisheries, Firat University, Elazig 23119, TurkeyFaculty of Fisheries, Firat University, Elazig 23119, TurkeyDepartment of Biology, Faculty of Art and Science, Nevşehir Haci Bektaş Veli University, Nevşehir 50300, TurkeyNew College of Interdisciplinary Arts & Sciences, School of Mathematical & Natural Sciences, Arizona State University, Glendale, AZ 85306, USANew College of Interdisciplinary Arts & Sciences, School of Mathematical & Natural Sciences, Arizona State University, Glendale, AZ 85306, USAWithin the eastern Mediterranean, increased fishing pressure coupled with a lack of basic biological information is threatening the sustainability of the rare Lusitanian cownose ray (<i>Rhinoptera marginata</i>). To provide baseline life-history data for this species, age estimates were obtained from vertebral band counts of 224 rays (size range: 210–998 mm disc width and 140 to 13,600 g weight) collected from Iskenderun Bay. Females ranged in size from 210 to 998 mm disc width and 238 to 13,600 g weight, while males ranged from 130 to 866 mm disc width and 140 to 8250 g weight. The index of average percent error (2.8%) and age-bias plot suggest that the aging method used represents a precise and non-biased approach. Marginal increment analysis indicated that a single opaque band is deposited annually between August and September. The oldest ages obtained for <i>R. marginata</i> were 9 years for males and 19 years for females, which corresponded to total lengths of 866 and 998 mm disc width, respectively. For males, limited samples prevented the accurate calculation of growth rates; however, for combined sexes, observed and disc width-at-age data resulted in the following von Bertalanffy growth parameters: <i>DW</i><sub>∞</sub> = 1102.16 mm, <i>k</i> = 0.148 and <i>t</i><sub>0</sub> = −0.2167. Although additional samples are necessary to determine growth rates in males, the results of the present study indicate that <i>R. marginata</i> females exhibit life history characteristics similar to other <i>Rhinoptera</i> species.https://www.mdpi.com/2077-1312/10/5/685elasmobranchRhinopteridaebatoidsagegrowthMediterranean |
| spellingShingle | Nuri Başusta Asiye Başusta Erdoğan Çiçek Angela M. Cicia James A. Sulikowski First Estimates of Age and Growth of the Lusitanian Cownose Ray (<i>Rhinoptera marginata</i>) from the Mediterranean Sea Journal of Marine Science and Engineering elasmobranch Rhinopteridae batoids age growth Mediterranean |
| title | First Estimates of Age and Growth of the Lusitanian Cownose Ray (<i>Rhinoptera marginata</i>) from the Mediterranean Sea |
| title_full | First Estimates of Age and Growth of the Lusitanian Cownose Ray (<i>Rhinoptera marginata</i>) from the Mediterranean Sea |
| title_fullStr | First Estimates of Age and Growth of the Lusitanian Cownose Ray (<i>Rhinoptera marginata</i>) from the Mediterranean Sea |
| title_full_unstemmed | First Estimates of Age and Growth of the Lusitanian Cownose Ray (<i>Rhinoptera marginata</i>) from the Mediterranean Sea |
| title_short | First Estimates of Age and Growth of the Lusitanian Cownose Ray (<i>Rhinoptera marginata</i>) from the Mediterranean Sea |
| title_sort | first estimates of age and growth of the lusitanian cownose ray i rhinoptera marginata i from the mediterranean sea |
| topic | elasmobranch Rhinopteridae batoids age growth Mediterranean |
| url | https://www.mdpi.com/2077-1312/10/5/685 |
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