Feeding in Deep Water Habitats: Strategies and Adaptations to a Difficult and Changing Environment

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Biology".

Deadline for manuscript submissions: closed (1 May 2023) | Viewed by 2001

Special Issue Editors


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Guest Editor
Italian Institute for Environmental Protection and Research, Rome, Italy
Interests: fish and shark anatomy and morphology; eco-biology and conservation of elasmobranch and marine fish species

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Co-Guest Editor
C.I.R.S.PE., Italian Fishery Research and Studies Center, 00184 Rome, Italy
Interests: analysis of benthic communities of soft and hard bottom; taxonomy and identification of marine fauna and Mediterranean alien species (invertebrates and ichthyofauna) and underwater marine biomonitoring (benthic community and Posidonia oceanica)

Special Issue Information

Dear Colleagues,

Extreme ecological conditions that are typical of deep-sea environments have been stimulating resident species to evolve by adapting to a harsh environment according to their different biological needs and constraints. The particularly subtle ecological balances, acquired by species for survival, result in the consequent fragility of several of their bio-ecological traits, as well as in susceptibility to major changes in response to human-induced environmental pressures. Among these, global warming, pollutant contamination, fishing, and offshore activities/infrastructures’ impact are major causes of disturbance in deep-sea environments as well, which are in addition attracting increasing economic interest in the biological and geological resources they hold. Unfortunately, their remoteness limits our ability to understand the magnitude of the ecological changes that are occurring and could have devastating effects on the entire marine ecosystem. Feeding is the ecological function that best allows us to understand the interactions between organisms and the environment; this is particularly true in deep-sea environments where feeding strategies are more susceptible to environmental changes, having been shaped under the chronic scarcity of food resources and the unpredictability of their variation, which has acted as a major limiting factor compared to coastal environments. This Special Issue provides an opportunity to explore this topic in more detail, accepting works that address the feeding of animal species in a limiting environment such as marine deep waters, and/or in conjunction with anthropogenic pressure-induced changes in this context.

Dr. Umberto Scacco
Dr. Francesco Tiralongo
Dr. Emanuele Mancini
Guest Editors

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Keywords

  • feeding strategies
  • deep water
  • fish
  • sharks
  • rays
  • marine invertebrates
  • marine pollution
  • climate change
  • off-shore anthropic activities

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Published Papers (1 paper)

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Research

25 pages, 2108 KiB  
Article
Feeding in Deep Waters: Temporal and Size-Related Plasticity in the Diet of the Slope Predator Fish Coelorinchus caelorhincus (Risso, 1810) in the Central Tyrrhenian Sea
by Umberto Scacco, Francesco Tiralongo and Emanuele Mancini
J. Mar. Sci. Eng. 2022, 10(9), 1235; https://doi.org/10.3390/jmse10091235 - 2 Sep 2022
Cited by 4 | Viewed by 2335
Abstract
In-depth studies on the effect of size and period in the diet of the hollow-snout grenadier Coelorinchus caelorhincus in the Mediterranean Sea are scant and incomplete. We obtained 75 specimens of this species from the discard of deep trawl fishing on the slope [...] Read more.
In-depth studies on the effect of size and period in the diet of the hollow-snout grenadier Coelorinchus caelorhincus in the Mediterranean Sea are scant and incomplete. We obtained 75 specimens of this species from the discard of deep trawl fishing on the slope of the central Tyrrhenian Sea. As corollary data, we estimated the length–weight relationship, the size frequency distribution, and composition of sexual maturity stages of the sampled individuals. We deepened stomach content analysis aiming at the evaluation of size and period’s effect in the fish diet by Costello’s interpretation of dietary indexes and correspondence analysis. The corollary results suggested negative allometric growth (b = 2.69), an asynchronous reproductive strategy (paucity of mature individuals) and a size-related bathymetrical distribution for this species (prevalence of small and intermediate-sized specimens). The prey importance index (PII) revealed that the hollow-snout grenadier is a generalist feeder on cephalopods (PII: 0–1200), fish (PII: 0–1000), crustaceans (PII: 4000–6000), and polychaetes (PII: 400–1800), and a light specialist at population level on the dominant prey among them. At the micro-taxa level, the species was found to be a generalist feeder on 10 groups of rare prey and a light specialist at population level on amphipods (PII: 1300–3200). Overall, results indicated the presence of two feeding gradients that determined an intermingled effect of size and period on fish diet. In particular, intraspecific competition and stability of food resources appeared as the factors that significantly harmonize the diet of Coelorinchus caoelorhincus in the context of the ecotrophic constraints of a deep-sea species. Full article
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