Weight–length relations for 103 fish species from the southern Aegean Sea, Turkey

Bilge, Gökçen; Yapıcı, Sercan; Filiz, Halit; Cerim, Hasan

doi:10.3750/aip2014.44.3.11

Cited by 59 publications

(35 citation statements)

References 11 publications

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“…Total lengths of L. dieuzeidei in this study were between 7.15–16.20 cm, which was similar to L. dieuzeidei from the southern Aegean Sea (range 8.7–14.1 cm (Bilge, Yapici, Filiz, & Cerim, )), Portugal coasts, Atlantic Ocean (range 6.8–16.2 cm (Olim & Borges, )) but larger than those from the Adriatic Sea (range 7.4–13.7 cm (Valisneri et al., )). However, lengths of L. dieuzeidei from the Tyrrhenian Sea were between 5.0–19.0 cm (Voliani, Mannini, & Auteri, ), which might be attributed to the differences of catch time, catch equipments and the number of fish sampled.…”

Section: Discussionsupporting

confidence: 71%

A study on age and growth characteristics of spiny gurnard (Lepidotrigla dieuzeidei Blanc & Hureau, 1973), northeastern Mediterranean Sea

Başusta

Çalta

et al. 2017

J Appl Ichthyol

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This study investigated the age and growth characteristics of spiny gurnard, Lepidotrigla dieuzeidei, from the northeastern Mediterranean. Samples were collected by commercial trawls during the 2012-2013 fishing seasons. A total 1,878 speciments ranged from 7.10 to 15.90 cm total length and 2.28-35.88 g in weight. Female/male ratio was 1.2/1. The total length-weight relationship was W = 0.002 TL 3.579 (r² = .909) for sexes combined, W = 0.0021 TL 3.551 (r² = .914) for males and W = 0.0019 TL 3.602 (r² = .904) for females. Age determination was conducted using the sagittal otoliths. Ages of examined individulas ranged from 3 to 11 years. Total length-at-age data were fitted using the von Bertalanffy growth model. Estimated growth functions were TL t = 18.100 [1−e −0.14 (t + 0.63) ] for sexes combined, TL t = 23.587 [1−e −0.08 (t + 1.56) ] for males and TL t = 16.612 [1−e −0.19 (t + 0.15) ] for females. How to cite this article: Başusta A, Başusta N, Calta M, Ozcan EI. A study on age and growth characteristics of spiny gurnard (Lepidotrigla dieuzeidei

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Section: Discussionsupporting

confidence: 71%

A study on age and growth characteristics of spiny gurnard (Lepidotrigla dieuzeidei Blanc & Hureau, 1973), northeastern Mediterranean Sea

Başusta

Çalta

et al. 2017

J Appl Ichthyol

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“…To circumvent this problem, fish catches were converted to biomass (kg). Published length/weight relationships were used for this conversion ( Morey et al, 2003 ; Ilkyaz et al, 2008 ; Bilge et al, 2014 ). However, when precise length measurements were not practical the organisms were assigned into 10 cm length classes (see justification above), except for P. elephas which were assigned into 5 cm CL classes.…”

Section: Methodsmentioning

confidence: 99%

Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery

Catanese

Hinz

Gil

et al. 2018

PeerJ

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In the Balearic Islands, different trammel net designs have been adopted to promote fisheries sustainability and reduce discards. Here, we compare the catch performance of three trammel net designs targeting the spiny lobster Palinurus elephas in terms of biomass, species composition and revenue from commercial catches and discards. Designs differ in the netting fiber type (standard polyfilament, PMF, or a new polyethylene multi-monofilament, MMF) and the use of a guarding net or greca, a mesh piece intended to reduce discards. Catches were surveyed by an on-board observer from 1,550 netting walls corresponding to 70 nets. The number of marketable species captured indicated that the lobster trammel net fishery has multiple targets, which contribute significantly to the total revenue. The discarded species ranged from habitat-forming species to elasmobranches, but the magnitude of gear-habitat interactions on the long term dynamics of benthos remains unclear. No relevant differences in revenue and weight of discards were detected after Bayesian analyses. However, the species composition of discards was different when using greca. Interestingly, high immediate survival was found for discarded undersized lobsters, while a seven day survival assessment, using captive observation, gave an asymptotic estimate of survival probability as 0.64 (95% CI [0.54–0.76]). Therefore, it is recommended that it would be beneficial for this stock if an exemption from the EU landing obligation regulation was sought for undersized lobsters in the Balearic trammel net fishery.

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“…The weight of the individuals sampled on board was obtained using length-weight relationships (Morey et al 2003, İlkyaz et al 2008, Bilge et al 2014. However, when no length measure was available for a given item, the average length of all the conspecific items was used.…”

Section: Characterization Of Capturesmentioning

confidence: 99%

Commercial catches and discards of a Mediterranean small-scale cuttlefish fishery: implications of the new EU discard policy

et al. 2018

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The cuttlefish (Sepia officinalis) trammel net fishery is one of the most important small-scale fisheries in the Mediterranean Sea. Here we describe the main catch, by-catch and discard patterns found in this fishery on Mallorca Island by onboard surveys of 1005 netting walls from 23 fishing trips. The number of items captured, their size and their subsequent use, i.e. kept for sale or discarded, were recorded. Furthermore, the immediate survival of the unwanted items (i.e. vitality state when the gear came on board) and the medium-term survival of a subsample were assessed. The cuttlefish was the dominant species in the commercial fraction of the catch, particularly during the fishing season peak (March). However, S. officinalis catches quickly decreased further into the season, with other high-value fish, such as Scorpaena scrofa, increasing in the commercial fraction of the catch. As species composition is continuously changing, it is often difficult to determine the main target species of this fishery. This strategy possibly complicates management but maximizes fishing revenue, which was an average of €175 per trip. With respect to discards, up to 104 different species were caught but not commercialized. The most abundant were Holothuria sp. and Torpedo marmorata. Their immediate survival was 100% and 20%, respectively. In both cases, the medium-term survival and the vitality status were high after seven days in monitored captivity. Therefore, in these cases, their immediate release to the sea should be promoted, given that they are exempt from the EU landing obligation. Interviews with fishers revealed that the perceived quantity of discards was lower than the amount recorded by the present study. Currently, just a small percentage (1.5%) of these discards will be affected by the landing obligation enforced by the new European discards ban.

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Weight–length relations for 103 fish species from the southern Aegean Sea, Turkey

Cited by 59 publications

References 11 publications

A study on age and growth characteristics of spiny gurnard (Lepidotrigla dieuzeidei Blanc & Hureau, 1973), northeastern Mediterranean Sea

A study on age and growth characteristics of spiny gurnard (Lepidotrigla dieuzeidei Blanc & Hureau, 1973), northeastern Mediterranean Sea

Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery

Commercial catches and discards of a Mediterranean small-scale cuttlefish fishery: implications of the new EU discard policy

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