2018
 

Effect of bait type and size on catch efficiency of narrow-barred Spanish mackerel (Scomberomorus commerson) in the Persian Gulf handline fisheries

År: 2018

Effect of bait type and size on catch efficiency of narrow-barred Spanish mackerel (Scomberomorus commerson) in the Persian Gulf handline fisheries

Eighani, M., Paighambari, S. Y., Herrmann, B. & Feekings, J. 1 Mar 2018 In : Fisheries Research. 199, p. 32-35

Publication: Research - peer-reviewJournal article – Annual report year: 2017

In the Persian Gulf handline fishery, fishers mostly use Cutlassfish (Trichiurus lepturus) bait for targeting narrow-barred Spanish mackerel (Scomberomorus commerson) However, Cutlassfish are expensive compared to other baits and also a commercially important species that is typically exported to Asian countries. In order to conserve Cutlassfish resources and reduce costs of fishing, the effect of changing bait type and size on the catch efficiency and size structure of narrow-barred Spanish mackerel caught in the Persian Gulf handline fishery was investigated. The alternative baits investigated, Indian mackerel (Rastrelliger kanagurta) and artificial bait (lead lure), resulted in a lower overall catch efficiency and a shift in catch pattern towards smaller individuals. The two alternative baits had very similar overall catch efficiencies. The results obtained demonstrate that bait type and size affects both overall catch efficiency and size structure of narrow-barred Spanish mackerel caught in the Persian Gulf handline fishery. This implies that managing bait type and size might complement standard harvest regulations and facilitate changing exploitation pattern in the Persian Gulf handline fishery.

Original languageEnglish
JournalFisheries Research
Volume199
Pages (from-to)32-35
ISSN0165-7836
DOIs
StatePublished - 1 Mar 2018

 

Assessing stakeholder's experience and sensitivity on key issues for the economic growth of organic aquaculture production

År: 2018

Assessing stakeholder's experience and sensitivity on key issues for the economic growth of organic aquaculture production

Lembo, G., Jokumsen, A., Spedicato, M. T., Facchini, M. T. & Bitetto, I. 2018 In : Marine Policy. 87, p. 84-93

Publication: Research - peer-reviewJournal article – Annual report year: 2017

Participatory management is widely recognised as a working method of paramount importance, based on the principles of knowledge sharing, accountability and legitimacy. Hence, it is broadly considered suitable for
addressing issues related to the sustainable development of the seafood industry, and specifically, of the aquaculture system. A survey focused on the current EU regulatory framework was carried out to elicit stakeholders’
preferences, knowledge and experience on key issues for the development of organic aquaculture, supported by science-based regulations. The survey was completed by 65 stakeholders belonging to several categories, and it was supported by the implementation of the Analytic Hierarchy Process method. Stakeholders’ preferences were elicited on organic production methods and control systems, the quality of the environment and organic products, fish health and welfare. The views expressed by the participants revealed both competence and awareness, despite the complexity of the subject. Several ideas and useful suggestions emerged regarding unresolved technical issues. In addition, the need for a targeted communication strategy on the quality of organic aquaculture products and the necessity of fostering European/national programs to support the production and marketing of organic aquaculture products were highlighted
Original languageEnglish
JournalMarine Policy
Volume87
Pages (from-to)84-93
ISSN0308-597X
DOIs
StatePublished - 2018

2017
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Food availability drives plastic self-repair response in a basal metazoan-case study on the ctenophore Mnemiopsis leidyi A. Agassiz

År: 2017

Food availability drives plastic self-repair response in a basal metazoan-case study on the ctenophore Mnemiopsis leidyi A. Agassiz

Bading, K. T., Kaehlert, S., Chi, X., Jaspers, C., Martindale, M. Q. & Javidpour, J. 1 Dec 2017 In : Scientific Reports. 7, 1, 16419

Publication: Research - peer-reviewJournal article – Annual report year: 2017

Many marine invertebrates including ctenophores are capable of extensive body regeneration when injured. However, as for the invasive ctenophore Mnemiopsis leidyi, there is a constant subportion of individuals not undergoing whole body regeneration but forming functionally stable half-animals instead. Yet, the driving factors of this phenomenon have not been addressed so far. This study sheds new light on how differences in food availability affect self-repair choice and regeneration success in cydippid larvae of M. leidyi. As expected, high food availability favored whole-body regeneration. However, under low food conditions half-animals became the preferential self-repair mode. Remarkably, both regenerating and half-animals showed very similar survival chances under respective food quantities. As a consequence of impaired food uptake after injury, degeneration of the digestive system would often occur indicating limited energy storage capacities. Taken together, this indicates that half-animals may represent an alternative energy-saving trajectory which implies self-repair plasticity as an adaptive trade-off between high regeneration costs and low energy storage capacities. We conclude that self-repair plasticity could lead to higher population fitness of ctenophores under adverse conditions such as in ships' ballast water tanks which is postulated to be the major vector source for the species' spreading around the globe.

Original languageEnglish
Article number16419
JournalScientific Reports
Volume7
Issue number1
ISSN2045-2322
DOIs
StatePublished - 1 Dec 2017

 

Hvordan undervandsdroner og robotter kan hjælpe med at monitere det arktiske marine miljø

År: 2017

Hvordan undervandsdroner og robotter kan hjælpe med at monitere det arktiske marine miljø

Edelvang, K. 2017 In : Tidsskriftet Grønland. 3, p. 254-264

Publication: ResearchJournal article – Annual report year: 2017

Original languageDanish
JournalTidsskriftet Grønland
Issue number3
Pages (from-to)254-264
ISSN0017-4556
StatePublished - 2017

 

Sæler og fisk som naturlige måleplatforme

År: 2017

Sæler og fisk som naturlige måleplatforme

Boje, J. 2017 In : Tidsskriftet Grønland. 3, p. 270-276

Publication: ResearchJournal article – Annual report year: 2017

Original languageDanish
JournalTidsskriftet Grønland
Issue number3
Pages (from-to)270-276
ISSN0017-4556
StatePublished - 2017