Proximate and Mineral Quality Changes in Fillets of Three Fish Species (Mugil cephalus, Chrysichthys nigrodigitatus and Oreochrumis niloticus) at Frozen Storage (Sub 0°C)

Anene, Afamdi

doi:10.11648/j.ijnfs.20150403.29

Cited by 1 publication

(2 citation statements)

References 17 publications

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“…Besides the decline in prey abundance, the difference between our findings and that of Barros et al (2004) points to a substantial change in the composition of dolphin diet, but given the similar energy densities of the predominant estuarine fish in the PRD (Han & Dong 1994;Liu et al 2009;Li & Tao 2014;Lu & Deng 2014;Anene et al 2015), change in dietary composition alone (without a decline in overall prey abundance) may not affect the energy intake of dolphins. The efficiency of dolphin energy intake can be expected to depend on 2 primary factors:…”

Section: Temporal Difference In Dietcontrasting

confidence: 67%

“…2009; Li & Tao 2014; Lu & Deng 2014; Anene et al . 2015), change in dietary composition alone (without a decline in overall prey abundance) may not affect the energy intake of dolphins. The efficiency of dolphin energy intake can be expected to depend on 2 primary factors: (1) prey size, as predation on large prey will maximize energy intake and minimize the time (and energy) spent hunting; and (2) prey abundance, as hunting success rate is expected to increase with the size of fish shoal (Baird & Dill 1996; Thompson 2017).…”

Section: Discussionmentioning

confidence: 99%

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Prey decline leads to diet shift in the largest population of Indo‐Pacific humpback dolphins?

et al. 2021

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The Pearl River Delta (PRD) region on the southeast coast of China has long been known as a highly productive fishing ground. Since the late 1980s, fishing pressure in the PRD has been intense, which warrants concerns of potential fishery-related impacts on the food resources and foraging ecology of apex marine predators in this region, such as the Indo-Pacific humpback dolphin (Sousa chinensis). In this study, we examined 54 stomachs with food remains, collected from beached carcasses of humpback dolphins recovered during fifteen years between 2003 and 2017. The 6043 identified prey items represent 62 teleost taxa, primarily small estuarine fish, but also larger reef fish. The dolphins appear to be opportunistic foragers, hunting across the water-column, with preference for shoaling and meaty fishes (e.g. Collichthys lucidus IRI% = 38.6%, Johnius belangerii IRI% = 23.1%, Mugil cephalus IRI% = 14.0%). Our findings suggest a dietary shift in recent years, from primarily demersal (as previously reported) to greater intake of neritic and pelagic fish. Dolphin foraging group size has decreased in recent years, which corresponds with declining size and numbers of prey items retrieved from dolphin stomachs. We suggest that these are indicators of declining food resources. Faced with a shortage of preferred prey, humpback dolphins may have broadened their dietary spectrum to maintain their daily energy intake, while their foraging group size decreased in response to the altered tradeoff between the costs and benefits of group foraging.

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Section: Temporal Difference In Dietcontrasting

confidence: 67%