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Ontogenetic Dietary Shift in Megabenthic Predatory Elasmobranchs of a Tropical Estuarine Bay
Elasmobranchs play a significant role in structuring the marine food webs in many marine habitats. Estuaries provide an essential habitat primarily as nurseries for elasmobranchs. The present study investigates the feeding preferences of megabenthic predatory elasmobranchs from Caranzalem Bay, Goa....
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| Published in: | Estuaries and coasts 2023, Vol.46 (1), p.279-291 |
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| container_title | Estuaries and coasts |
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| creator | Yogi, Deepa Shashikant Naik, Akshay Panda, Prema Piyusha Yadav, Ranjana Desai, Aniket Nanajkar, Mandar |
| description | Elasmobranchs play a significant role in structuring the marine food webs in many marine habitats. Estuaries provide an essential habitat primarily as nurseries for elasmobranchs. The present study investigates the feeding preferences of megabenthic predatory elasmobranchs from Caranzalem Bay, Goa. The elasmobranchs in this habitat were represented by guitarfishes,
Glaucostegus granulatus
and
Glaucostegus obtusus
; rays,
Brevitrygon walga
,
Pastinachus sephen
,
Neotrygon kuhlii
, and
Maculabatis gerrardi
; and bamboo sharks,
Chiloscyllium griseum
and
Chiloscyllium
spp. Crustaceans were the major prey of these predators followed by teleosts and cephalopods. The bamboo shark was an opportunistic predator while rays and guitarfish were specialised feeders on penaeid shrimps. Indices suggest that bamboo sharks occupy the highest trophic level in this benthic food chain while guitarfishes and rays function as mesopredators. Ontogenetic dietary changes were observed in all predators, indicating the feeding niche segregation among size classes. Low resource overlap was observed between and within species probably due to high prey availability in the bay. These elasmobranch species frequently occur in bycatch, which can negatively affect their populations and thereby impact the lower trophic strata resulting in large-scale ecological repercussions. |
| doi_str_mv | 10.1007/s12237-022-01130-5 |
| format | article |
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Glaucostegus granulatus
and
Glaucostegus obtusus
; rays,
Brevitrygon walga
,
Pastinachus sephen
,
Neotrygon kuhlii
, and
Maculabatis gerrardi
; and bamboo sharks,
Chiloscyllium griseum
and
Chiloscyllium
spp. Crustaceans were the major prey of these predators followed by teleosts and cephalopods. The bamboo shark was an opportunistic predator while rays and guitarfish were specialised feeders on penaeid shrimps. Indices suggest that bamboo sharks occupy the highest trophic level in this benthic food chain while guitarfishes and rays function as mesopredators. Ontogenetic dietary changes were observed in all predators, indicating the feeding niche segregation among size classes. Low resource overlap was observed between and within species probably due to high prey availability in the bay. These elasmobranch species frequently occur in bycatch, which can negatively affect their populations and thereby impact the lower trophic strata resulting in large-scale ecological repercussions.</description><identifier>ISSN: 1559-2723</identifier><identifier>EISSN: 1559-2731</identifier><identifier>DOI: 10.1007/s12237-022-01130-5</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Aquatic crustaceans ; Aquatic habitats ; Bamboo ; Benthos ; Brackishwater environment ; Bycatch ; Cephalopods ; Chiloscyllium plagiosum ; Coastal Sciences ; Crustaceans ; Earth and Environmental Science ; Ecological effects ; Ecology ; Environment ; Environmental Management ; Estuaries ; Feeding ; Feeding preferences ; Food chains ; Food webs ; Freshwater & Marine Ecology ; Granulation ; Habitats ; Marine fishes ; Ontogeny ; Predators ; Prey ; Rhinobatidae ; Segregation ; Sharks ; Shellfish ; Shrimps ; Trophic levels ; Water and Health</subject><ispartof>Estuaries and coasts, 2023, Vol.46 (1), p.279-291</ispartof><rights>The Author(s), under exclusive licence to Coastal and Estuarine Research Federation 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-7ad8e037652c18ae2b38f350a19220a6c101f23c6fbb1b79d37500f6db65101c3</citedby><cites>FETCH-LOGICAL-c319t-7ad8e037652c18ae2b38f350a19220a6c101f23c6fbb1b79d37500f6db65101c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Yogi, Deepa Shashikant</creatorcontrib><creatorcontrib>Naik, Akshay</creatorcontrib><creatorcontrib>Panda, Prema Piyusha</creatorcontrib><creatorcontrib>Yadav, Ranjana</creatorcontrib><creatorcontrib>Desai, Aniket</creatorcontrib><creatorcontrib>Nanajkar, Mandar</creatorcontrib><title>Ontogenetic Dietary Shift in Megabenthic Predatory Elasmobranchs of a Tropical Estuarine Bay</title><title>Estuaries and coasts</title><addtitle>Estuaries and Coasts</addtitle><description>Elasmobranchs play a significant role in structuring the marine food webs in many marine habitats. Estuaries provide an essential habitat primarily as nurseries for elasmobranchs. The present study investigates the feeding preferences of megabenthic predatory elasmobranchs from Caranzalem Bay, Goa. The elasmobranchs in this habitat were represented by guitarfishes,
Glaucostegus granulatus
and
Glaucostegus obtusus
; rays,
Brevitrygon walga
,
Pastinachus sephen
,
Neotrygon kuhlii
, and
Maculabatis gerrardi
; and bamboo sharks,
Chiloscyllium griseum
and
Chiloscyllium
spp. Crustaceans were the major prey of these predators followed by teleosts and cephalopods. The bamboo shark was an opportunistic predator while rays and guitarfish were specialised feeders on penaeid shrimps. Indices suggest that bamboo sharks occupy the highest trophic level in this benthic food chain while guitarfishes and rays function as mesopredators. Ontogenetic dietary changes were observed in all predators, indicating the feeding niche segregation among size classes. Low resource overlap was observed between and within species probably due to high prey availability in the bay. These elasmobranch species frequently occur in bycatch, which can negatively affect their populations and thereby impact the lower trophic strata resulting in large-scale ecological repercussions.</description><subject>Aquatic crustaceans</subject><subject>Aquatic habitats</subject><subject>Bamboo</subject><subject>Benthos</subject><subject>Brackishwater environment</subject><subject>Bycatch</subject><subject>Cephalopods</subject><subject>Chiloscyllium plagiosum</subject><subject>Coastal Sciences</subject><subject>Crustaceans</subject><subject>Earth and Environmental Science</subject><subject>Ecological effects</subject><subject>Ecology</subject><subject>Environment</subject><subject>Environmental Management</subject><subject>Estuaries</subject><subject>Feeding</subject><subject>Feeding preferences</subject><subject>Food chains</subject><subject>Food webs</subject><subject>Freshwater & Marine Ecology</subject><subject>Granulation</subject><subject>Habitats</subject><subject>Marine fishes</subject><subject>Ontogeny</subject><subject>Predators</subject><subject>Prey</subject><subject>Rhinobatidae</subject><subject>Segregation</subject><subject>Sharks</subject><subject>Shellfish</subject><subject>Shrimps</subject><subject>Trophic levels</subject><subject>Water and Health</subject><issn>1559-2723</issn><issn>1559-2731</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LAzEQhoMoWKt_wFPA8-ok2Wy6R631AyoVrDchZLNJu6VNapIe-u9NXdGbpxl4P4Z5ELokcE0AxE0klDJRAKUFEMKg4EdoQDivCyoYOf7dKTtFZzGuAErOoRygj5lLfmGcSZ3G951JKuzx27KzCXcOv5iFaoxLyyy-BtOq5LM8Wau48U1QTi8j9hYrPA9-22m1xpOYdip0zuA7tT9HJ1ato7n4mUP0_jCZj5-K6ezxeXw7LTQjdSqEakcGmKg41WSkDG3YyDIOitSUgqo0AWIp05VtGtKIumWCA9iqbSqeJc2G6Krv3Qb_uTMxyZXfBZdPSirKUVXWvOTZRXuXDj7GYKzchm6T_5UE5IGi7CnKTFF-U5SHEOtDMZvdwoS_6n9SX8JAdG4</recordid><startdate>2023</startdate><enddate>2023</enddate><creator>Yogi, Deepa Shashikant</creator><creator>Naik, Akshay</creator><creator>Panda, Prema Piyusha</creator><creator>Yadav, Ranjana</creator><creator>Desai, Aniket</creator><creator>Nanajkar, Mandar</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QG</scope><scope>7SN</scope><scope>7TN</scope><scope>7U7</scope><scope>7UA</scope><scope>7XB</scope><scope>8AO</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H95</scope><scope>H96</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>M2O</scope><scope>M7N</scope><scope>MBDVC</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope></search><sort><creationdate>2023</creationdate><title>Ontogenetic Dietary Shift in Megabenthic Predatory Elasmobranchs of a Tropical Estuarine Bay</title><author>Yogi, Deepa Shashikant ; 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Estuaries provide an essential habitat primarily as nurseries for elasmobranchs. The present study investigates the feeding preferences of megabenthic predatory elasmobranchs from Caranzalem Bay, Goa. The elasmobranchs in this habitat were represented by guitarfishes,
Glaucostegus granulatus
and
Glaucostegus obtusus
; rays,
Brevitrygon walga
,
Pastinachus sephen
,
Neotrygon kuhlii
, and
Maculabatis gerrardi
; and bamboo sharks,
Chiloscyllium griseum
and
Chiloscyllium
spp. Crustaceans were the major prey of these predators followed by teleosts and cephalopods. The bamboo shark was an opportunistic predator while rays and guitarfish were specialised feeders on penaeid shrimps. Indices suggest that bamboo sharks occupy the highest trophic level in this benthic food chain while guitarfishes and rays function as mesopredators. Ontogenetic dietary changes were observed in all predators, indicating the feeding niche segregation among size classes. Low resource overlap was observed between and within species probably due to high prey availability in the bay. These elasmobranch species frequently occur in bycatch, which can negatively affect their populations and thereby impact the lower trophic strata resulting in large-scale ecological repercussions.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s12237-022-01130-5</doi><tpages>13</tpages></addata></record> |
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| ispartof | Estuaries and coasts, 2023, Vol.46 (1), p.279-291 |
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| language | eng |
| recordid | cdi_proquest_journals_2748649545 |
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| subjects | Aquatic crustaceans Aquatic habitats Bamboo Benthos Brackishwater environment Bycatch Cephalopods Chiloscyllium plagiosum Coastal Sciences Crustaceans Earth and Environmental Science Ecological effects Ecology Environment Environmental Management Estuaries Feeding Feeding preferences Food chains Food webs Freshwater & Marine Ecology Granulation Habitats Marine fishes Ontogeny Predators Prey Rhinobatidae Segregation Sharks Shellfish Shrimps Trophic levels Water and Health |
| title | Ontogenetic Dietary Shift in Megabenthic Predatory Elasmobranchs of a Tropical Estuarine Bay |
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