Vertical distribution, diversity and assemblages of mesopelagic fishes in the western Mediterranean

Olivar, M. Pilar; Bernal, A.; Molı́, Balbina; Peña, Marian; Balbín, Rosa; Castellón, A.; Miquel, Joan; Massutí, Enric

doi:10.1016/j.dsr.2011.12.014

Cited by 165 publications

(154 citation statements)

References 51 publications

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“…During the course of the study a total of 218 depth-stratified mesozooplankton samples were selected to study decapod larvae, which were integrated in 34 hauls. From these, 18 were collected using HYDRO-BIOS multi-net in 2009 and 16 with a multiple opening closing net and environmental sensing system (MOCNESS) in 2010 (Olivar et al 2012). During each oblique haul along the whole column, generally performed down to 200 m depth on the shelf break and 500 m (in summer) or 850 m (in late autumn) on the middle slope, seven and five depth strata were fished in summer and late autumn, respectively.…”

Section: Methodsmentioning

confidence: 99%

Larval stages of crustacean species of interest for conservation and fishing exploitation in the western Mediterranean

Torres¹,

Santos²,

Alemany³

et al. 2013

Sci. Mar.

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SUMMARY: Decapod crustaceans are the main target species of deep water bottom trawl fisheries in the western Mediterranean. Despite their importance for fisheries and conservation, little is known about their larval development, especially in the case of deep water species. In this paper we present new information on the occurrence and morphology of larval stages for some species of commercial interest based on samples collected off the Balearic Islands. Mesozooplankton sampling was carried out using depth-stratified sampling devices at two stations located on the continental shelf break and middle slope, in the northwest and south of Mallorca in late autumn 2009 and summer 2010. We describe in detail the second mysis stage of the red shrimp Aristeus antennatus, not previously known, and the first larval stage of the slipper lobster Scyllarides latus, poorly described almost a hundred years ago. We also report the second finding of larvae of the spider crab Maja squinado and the first capture from the field of larval stages of the rose shrimp Parapenaeus longirostris and slipper lobster in the Mediterranean.

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Section: Methodsmentioning

confidence: 99%

Larval stages of crustacean species of interest for conservation and fishing exploitation in the western Mediterranean

Torres¹,

Santos²,

Alemany³

et al. 2013

Sci. Mar.

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“…Most mesopelagic fish migrate upward into the epipelagic layer at night and return to the mesopelagic zone in the daytime (Catul et al, 2011;Davison, 2011;Hudson et al, 2014). Because of their diel vertical migration (DVM), mesopelagic fish link primary consumers including copepods and zooplankton to higher predators including large pelagic fish, benthic fish, and marine mammals (Choy et al, 2012;Collins et al, 2012;Olivar et al, 2012). They play an important role in ocean food webs (Cherel et al, 2010;Kaartvedt et al, 2012), and their DVM behavior makes a significant contribution to the transfer of organic matter from the upper productive layer to deeper layers (Radchenko 2007; Hernández- León et al, 2010;Dypvik et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Factors affecting the fatty acid composition of mesopelagic fish of the continental slope in the South China Sea

Wang

Cui

et al. 2018

Preprint

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Study of the ecology of mesopelagic fish is central to assessing the active biological pump in the ocean, especially in the mesopelagic layer. As a consequence of the small size and pressure change, traditional stomach content analysis is not useful for analyzing the feeding behavior of mesopelagic fish. The use of δ 13 C and fatty acid analyses can help to resolve this problem. The mesopelagic fish examined in this study were collected from the continental slope in the north of the South China Sea (SCS), and are compared with nearshore SCS fish and fish collected from the Southern Ocean. The unusually high lipid content of the mesopelagic fish resulted in △δ 13 C values (i.e., the difference in δ 13 C between unextracted and extracted tissues) exceeding 1‰, which is more than the enrichment factor in the food web. Thus, extraction of lipids was conducted prior to δ 13 C isotope analysis for the study of trophic interactions of mesopelagic fish. Compared with other fish, mesopelagic fish had high C18:1n-9/C18:1n-7 and C20:1n-9/ C18:1n-7 ratios, which confirms that plankton is their main dietary source. Diatoms comprise a higher proportion of phytoplankton in the Southern Ocean and a lower proportion in the SCS, and this is reflected in the C20:5n-3/C22:6n-3 (EPA/DHA) ratio in mesopelagic fish in each region. The low EPA/DHA ratio in SCS fish indicates that diatoms are not the main component in the diet of mesopelagic fish. The SCS mesopelagic fish had higher C20:4n-6/C22:6n-3 (ARA/DHA) and C20:4n-6/C20:5n-3 (ARA/EPA) ratios than fish in the SouthernOcean. This result suggests that physical factors (e.g., temperature) also affect the fatty acid composition of these fish, particularly because certain fatty acids enable the fish to better adapt to extreme environmental conditions. Future studies of the synthesis of fatty acids in particular species should take account of both the dietary sources and physical factors in their environment. Keywords: mesopelagic fishes, lipids, δ 13 C, fatty acids, temperature, South China Sea Abstract Study of the ecology of mesopelagic fish is central to assessing the active biological pump in the ocean, especially in the mesopelagic layer. As a consequence of the small size and pressure change, traditional stomach content analysis is not useful for analyzing the feeding behavior of mesopelagic fish. The use of δ 13 C and fatty acid analyses can help to resolve this problem. The mesopelagic fish examined in this study were collected from the continental slope in the north of the South China Sea (SCS), and are compared with nearshore SCS fish and fish collected from the Southern Ocean. The unusually high lipid content of the mesopelagic fish resulted in ∆δ 13 C values (i.e., the difference in δ 13 C between unextracted and extracted tissues) exceeding 1‰, which is more than the enrichment factor in the food web. Thus, extraction of lipids was conducted prior to δ 13 C isotope analysis for the study of trophic interactions of mesopelagic fish.Compared with other fish, mesopelagic fish...

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“…From these, 18 samples were collected using a multi-net (HYDRO-BIOS) in 2009 and 16 samples using a multiple opening-closing net and environmental sensing system (MOCNESS) in 2010 (Olivar et al 2012). In order to determine the vertical distribution of decapod larvae, a series of oblique hauls were performed at four stations for 36 h at each site during the surveys in 2009 and 2010.…”

Section: Samplingmentioning

confidence: 99%

Larval stages of the deep-sea lobster Polycheles typhlops (Decapoda, Polychelida) identified by DNA analysis: morphology, systematic, distribution and ecology

et al. 2014

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A total of 25 specimens of Eryoneicus larvae were collected near the Balearic Archipelago (Western Mediterranean Sea) in 2009 and 2010. Detailed morphological examination indicated that the smallest individual corresponded with the first zoea (ZI) stage of Polycheles typhlops hatched from a berried female by Guerao and Abelló (J Nat Hist 30(8): [1179][1180][1181][1182][1183][1184] 1996). Only two species of deep-sea polychelid lobster, namely P. typhlops and Stereomastis sculpta, are known to occur in the Mediterranean. Genetic distance comparisons and phylogenetic analysis of the mitochondrial 16S rDNA and Cox I genes of this early larva together with adults from several Polycheles and Stereomastis species allowed us to assign it to P. typhlops. This is the first wild-caught larval stage of a polychelid lobster being identified using molecular techniques. The remaining specimens were attributed to zoeal stages II-III and decapodid stage based on morphological comparison. The arrangement of spines along the anterior part of the middorsal line (R, 1, 1, 1, 2, C 1 ), characteristic of the former species E. puritanii, discriminates these larvae from other Eryoneicus found in the Mediterranean. The clear presence of epipods on the third maxilliped and pereiopods of the decapodid stage gives further support to the identification of E. puritanii as the larval stages of P. typhlops. Additionally, information on the ecology of these larvae, their abundances during different seasons, as well as their bathymetric distribution is reported.

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Vertical distribution, diversity and assemblages of mesopelagic fishes in the western Mediterranean

Cited by 165 publications

References 51 publications

Larval stages of crustacean species of interest for conservation and fishing exploitation in the western Mediterranean

Larval stages of crustacean species of interest for conservation and fishing exploitation in the western Mediterranean

Factors affecting the fatty acid composition of mesopelagic fish of the continental slope in the South China Sea

Larval stages of the deep-sea lobster Polycheles typhlops (Decapoda, Polychelida) identified by DNA analysis: morphology, systematic, distribution and ecology

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