Browsing Deniz Bilimleri ve İşletmeciliği Enstitüsü by Author "Deniz Bilimleri ve İşletmeciliği Enstitüsü,-,Fiziksel Oşinografi Ve Deniz Biyolojisi"
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A critique of the balanced harvesting approach to fishing
Tsikliras, Athanassios C.; Froese, Rainer; Walters, Carl; Pauly, Daniel; Winker, Henning; Demirel, Nazli; Weyl, Olaf L. F. (2016)The approach to fisheries termed "balanced harvesting" (BH) calls for fishing across the widest possible range of species, stocks, and sizes in an ecosystem, in proportion to their natural productivity, so that the relative ... -
An overall indicator for the good environmental status of marine waters based on commercially exploited species
Demirel, Nazli; Sampang, Arlene (2015)An indicator is presented to assess and monitor the good environmental status of national marine waters based on the status of commercially exploited marine fishes and invertebrates, including fully-assessed as well as ... -
Conjoined Twinning Incidences in Trachurus mediterraneus (Steindachner, 1868) Eggs in Southern Marmara Sea
Avşar, Dursun; Mavruk, Sinan; Yuksek, Ahsen (2015)Conjoined twinning is a rarely existed gross malformation in natural conditions. The term refers to the two individuals united at any part of their bodies. The extraordinary incidences of conjoined twinning cases may reflect ... -
Estimating fisheries reference points from catch and resilience
Demirel, Nazli; Kleisner, Kristin M.; Froese, Rainer; Coro, Gianpaolo (2017)This study presents a Monte Carlo method (CMSY) for estimating fisheries reference points from catch, resilience and qualitative stock status information on data-limited stocks. It also presents a Bayesian state-space ... -
Ichthyoplankton dynamics in a highly urbanized estuary
Demirel, Nazli (2015)Spatio-temporal distribution and composition of ichthyoplankton assemblages were studied in the Golden Horn estuary (Istanbul) over a 10-month period. Environmental parameters were considered to determine the environmental ... -
On the pile-up effect and priors for L-inf and M/K: response to a comment by Hordyk et al. on "A new approach for estimating stock status from length frequency data" Reply
Coro, Gianpaolo; Scarcella, Giuseppe; Tsikliras, Athanassios C.; Dureuil, Manuel; Pauly, Daniel; Winker, Henning; Probst, Wolfgang Nikolaus; Demirel, Nazli; Dimarchopoulou, Donna (2019)<p>We thank Hordyk et al. (2019) for pointing out a typographical error in one of our equations, which has meanwhile been fixed in the online version of Froese et al. (2018) and addressed in a corrigendum for the printed ... -
Reply to Andersen et al. (2016) "Assumptions behind size-based ecosystem models are realistic"
Weyl, Olaf L. F.; Demirel, Nazli; Holt, Sidney J.; Tsikliras, Athanassios C.; Winker, Henning; Pauly, Daniel; Walters, Carl (2016)In a recent publication (Froese et al., ICES Journal of Marine Science; 73: 1640-1650), we presented a critique of the balanced harvesting (BH) approach to fishing. A short section dealt with the size-spectrum models used ... -
Reproductive biology of Trachurus mediterraneus (Carangidae): a detailed study for the Marmara - Black Sea stock
Demirel, Nazlı (2013)The reproductive biology of Mediterranean horse mackerel Trachurus mediterraneus was investigated in the Sea of Marmara over a one-year period. Duration and timing of the spawning season, gonad histology, oocyte development ... -
Revisiting safe biological limits in fisheries
Coro, Gianpaolo; Demirel, Nazli; Kleisner, Kristin (2016)The appropriateness of three official fisheries management reference points used in the north-east Atlantic was investigated: (i) the smallest stock size that is still within safe biological limits (SSBpa), (ii) the maximum ... -
Seasonal distribution of Trachurus mediterraneus (Steindachner, 1868) in the Golden Horn Estuary, Istanbul
Demirel, Nazlı (2014)Seasonal changes in the distribution of an important commercial and recreational fish species, Trachurus mediterraneus (Steindachner, 1868), from the family Carangidae were investigated in the Golden Horn Estuary of Istanbul. ... -
Spawning Frequency of Trachurus mediterraneus (Carangidae) in The Sea of Marmara
Demirel, Nazlı (2013)In this study the spawning frequency of Trachurus mediterraneus was estimated for the first time in the Mediterranean basin. The presence of the late-migratory nucleus stage oocytes and post ovulatory follicles (POFs) in ... -
Status and rebuilding of European fisheries
Matz-Lueck, Nele; Tsikliras, Athanassios C.; Demirel, Nazli; Dimarchopoulou, Donna; Froese, Rainer; Winker, Henning; Coro, Gianpaolo; Scarcella, Giuseppe (2018)Since January 2014, the reformed Common Fisheries Policy (CFP) of the European Union is legally binding for all Member States. It prescribes the end of overfishing and the rebuilding of all stocks above levels that can ... -
Weight-length relationships of 28 fish species in the Sea of Marmara
Murat Dalkara, Elif (2012)Weight-length relationships (WLRs) for 28 fish species were investigated in an enclosed basin in the Sea of Marmara. Due to low sample sizes (<15), 11 species were not taken into account, but length results were represented. ...