A network approach to by-catch in a multi-species Mediterranean small-scale fishery

Dimitriadis, Caterina; Borthagaray, Ana Inés; Vilela, Raúl; Casadevall, Margarida; Carranza, Alvar

doi:10.1016/j.fishres.2015.07.036

Cited by 9 publications

(9 citation statements)

References 45 publications

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“…Other work studied the impact of fishing (i.e. with fishers representing social nodes) on food web dynamics (Dimitriadis et al., 2016; Levine et al., 2015). Haak, Fath, Forbes, Martin, and Pope (2017) investigated the transmission and contagion of aquatic species across ecosystems, operationalizing the nodes of the network as water reservoirs located in the United States connected by movement of anglers between the reservoirs.…”

Section: Resultsmentioning

confidence: 99%

“…With only few exceptions, most studies classified as Type II used descriptive network statistics from classical social network analysis to study relational questions. For example, using network modularity for determining management units (Dimitriadis et al., 2016), or linking networks to ‘qualities of resilience’ (i.e. diversity, modularity, connectivity and feedback loops; Beilin et al., 2013).…”

Section: Resultsmentioning

confidence: 99%

“…Other work studied the impact of fishing (i.e. with fishers representing social nodes) on food web dynamics (Dimitriadis et al, 2016;Levine et al, 2015). Haak, Fath, Forbes, Martin, and Pope (2017) Beilin et al, 2013).…”

Section: Type II Network Studies For Ses Researchmentioning

confidence: 99%

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Studying human–nature relationships through a network lens: A systematic review

et al. 2020

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Studying human–nature relationships through a network lens: A systematic review

et al. 2020

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“…Due to their three-dimensional, branched morphology and soft colonial consistence, soft corals are particularly vulnerable to fishing activities (Mytilineou et al, 2014;Bo et al, 2015). In several areas of the Mediterranean various soft corals (genus Alcyonium sp., especially Alcyonium palmatum) have been commonly observed associated to lost fishing gears on Mediterranean continental shelf (Voultsiadou et al, 2011;Angiolillo et al, 2015) or as main components of fishing bycatch (Dimitriadis et al, 2016). Among the different fishing practices bottom trawling is the most harmful for anthozoan assemblages (Althaus et al, 2009).…”

Section: Conservation Remarksmentioning

confidence: 99%

Soft corals assemblages in deep environments of the Menorca Channel (Western Mediterranean Sea)

Grinyó

Garriga

Soler-Membrives

et al. 2020

Progress in Oceanography

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Image-based research in mesophotic and deep environments of the Mediterranean Sea has significantly increased during the past decades. So far, this research has been focused on the ecology of key structuring organisms such as scleractinians, antipatharians, gorgonians or large demosponges. However, the ecology of true soft corals has barely been studied and is still in a very preliminary stage. To overcome this situation, soft coral assemblages in shelf and slope environments of the Menorca Channel (Western Mediterranean Sea) have been studied through the quantitative analysis of 85 video transect recorded over 38500 m 2. Highest soft coral diversity was encountered on the shelf edge, resembling deep Mediterranean gorgonian patterns. Three soft coral assemblages, segregated by depth, substrate, and slope were identified: two monospecific ones composed by Nidalia studeri and Alcyonium palmatum, respectively and a multispecific one composed by Paralcyonium spinulosum, Alcyonium sp., Chironephthya mediterranea and Daniela koreni. The evaluated species presented average densities within the same range as other deep Mediterranean anthozoans ranging from 1 to 9 col. •m-2. However, N. studeri and P. spinulosum punctually formed dense monospecific aggregations, reaching maximum densities of 49 col.•m-2 and 60 col.•m-2 respectively. Both species monopolized vast extensions of the continental shelf and shelf edge. The identification and ecological characterization of these assemblages brings new insight about deep Mediterranean anthozoan communities, and provides baseline for future management plans in the study area.

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“…Despite the fact that the spotted flounder is not of great commercial interest, it is important to study this species to monitor fishing mortality and the effect of management (Gordo et al, 2016). The need for evaluating the effects of multi-gear fisheries on bycatch species is increasingly recognized (Dimitriadis et al, 2016) because differences in gear selectivity related to size, age and sex could have important implications for fisheries management (Lee et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Biology and fisheries of the spotted flounder (Citharus linguatula) caught by multiple gears with partial spatiotemporal overlaps

Pappa

Chychykalo

Koutsidi

et al. 2017

Aquat. Living Resour.

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Obtaining data to study fish biology can be a challenge if a stock is fished by a variety of gears with different effort units and different selectivity, particularly if these gears only partially overlap in space and time. In this work, we attempted to study the biology of the spotted flounder Citharus linguatula in the Patraikos Gulf and the adjacent central Ionian Sea (eastern Mediterranean) and to evaluate the current fisheries management. We characterized age composition and growth, length-at-maturity, and catch-perunit-effort (CPUE) of spotted flounder from the catches of bottom trawls, gillnets and trammel nets for the period autumn 2013-2014. Variation of fish total length, gonadosomatic index, hepatosomatic index and condition factor was analyzed using generalized additive models (GAMs) with regard to sex, date, fishing gear and depth. We also modeled CPUE fluctuations of each gear by date, depth, longitude and latitude using GAMs. Fish age ranged from 1 to 5 years. A slightly allometric growth was documented with females attaining larger sizes than males. Length-at-maturity was 163 mm for females and 169 mm for males. The seasonal change of gonad maturity stages and the gonadosomatic index indicated spawning in late summerautumn. Changes in length frequencies indicated that recruitment to the fisheries occurred in late springearly winter in shallow depth (<40 m). The catch composition of trawls and the CPUE model results suggested that the selectivity of this gear should be regulated to reduce catching immature individuals of spotted flounder. The results further indicated that the seasonal trawl closure of the Patraikos Gulf contributes to reduce catching juveniles.

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A network approach to by-catch in a multi-species Mediterranean small-scale fishery

Cited by 9 publications

References 45 publications

Studying human–nature relationships through a network lens: A systematic review

Studying human–nature relationships through a network lens: A systematic review

Soft corals assemblages in deep environments of the Menorca Channel (Western Mediterranean Sea)

Biology and fisheries of the spotted flounder (Citharus linguatula) caught by multiple gears with partial spatiotemporal overlaps

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