scholarly journals Data Poor Approach for the Assessment of the Main Target Species of Rapido Trawl Fishery in Adriatic Sea

2021 ◽  
Vol 8 ◽  
Author(s):  
Enrico Nicola Armelloni ◽  
Martina Scanu ◽  
Francesco Masnadi ◽  
Gianpaolo Coro ◽  
Silvia Angelini ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Single Species ◽  
Fishing Effort ◽  
Biological Information ◽  
North Central ◽  
Trawl Fishery ◽  
The North ◽  
Harvest Control Rule ◽  
The Common ◽  
Common Sole

Information on stock status is available only for a few of the species forming the catch assemblage of rapido fishery of the North-central Adriatic Sea (Mediterranean Sea). Species that are caught almost exclusively by this gear, either as target (such as Pectinidae) or accessory catches (such as flatfishes apart from the common sole), remain unassessed mainly due to the lack of data and biological information. Based on cluster analysis, the catch assemblage of this fishery was identified and assessed using CMSY model. The results of this data-poor methodology showed that, among the species analyzed, no one is sustainably exploited. The single-species CMSY results were used as input to an extension of the same model, to test the effect of four different harvest control rule (HCR) scenarios on the entire catch assemblage, through 15-years forecasts. The analysis showed that the percentage of the stocks that will reach Bmsy at the end of the projections will depend on the HCR applied. Forecasts showed that a reduction of 20% of fishing effort may permit to most of the target and accessory species of the rapido trawl fishery in the Adriatic Sea to recover to Bmsy levels within 15 years, also providing a slight increase in the expected catches.

Determinacy of fecundity in sole (Solea solea) from the Bristol Channel

1990 ◽  
Vol 70 (4) ◽  
pp. 803-813 ◽  
Author(s):  
J. W. Horwood ◽  
M. Greer Walker
Keyword(s):  
Bay Of Biscay ◽  
English Channel ◽  
Potential Fecundity ◽  
Frequency Distributions ◽  
The North ◽  
Size Frequency ◽  
Solea Solea ◽  
The North Sea ◽  
The Common ◽  
Common Sole

Ovaries of the common sole (Solea solea (Linnaeus)) were collected prior to, or at the beginning of, spawning from the spawning grounds in the Bristol Channel. Size frequency distributions of oocytes over 100 μm are presented. They clearly show a break in the size frequency distributions, at about 170 μm, indicating that the production of new oocytes to be spawned that season had ceased. It indicates that the sole is a determinate spawner and that, at least for this population, an annual potential fecundity can be measured. Estimated annual fecundity at length of Bristol Channel sole is calculated, and values are compared with those found for sole from the North Sea, eastern English Channel and the Bay of Biscay.

Taxonomic Keys to the Common Animals of the North Central States Exclusive of the Parasitic Worms, Insects and Birds

Copeia ◽  
1951 ◽  
Vol 1951 (4) ◽  
pp. 315
Author(s):  
Robert Rush Miller ◽  
Norman Hartweg ◽  
Samuel Eddy ◽  
A. C. Hodson
Keyword(s):  
North Central ◽  
The North ◽  
The Common ◽  
Parasitic Worms ◽  
Taxonomic Keys

scholarly journals Histological and Morphological Aspects of Reproduction in Male Blackspotted Smooth-HoundMustelus punctulatusin the Adriatic Sea (Eastern Mediterranean Sea)

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Romana Gračan ◽  
Gordana Lacković
Keyword(s):  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Seasonal Cycles ◽  
North Central ◽  
The North ◽  
Morphological Aspects ◽  
Maturation Stages ◽  
Seasonal Analysis ◽  
Sexually Mature ◽  
Mature Spermatozoa

We present first data on reproductive biology of male blackspotted smooth-houndMustelus punctulatusin the Adriatic Sea and first histological examination of gonads at different maturation stages and seasonal cycles for this species. We collected samples from 117 male specimens ofM. punctulatusranging in length from 44.6 to 126.5 cm, caught by commercial bottom trawls in the North-Central Adriatic Sea. Microscopic observation revealed a diametric development of testes, in which round-shaped spermatocysts have zonal arrangement, showing seven different stages of development. Males began to mature when they were between 61 and 88 cm body length, which was indicated by the presence of functional claspers or appearance of the spermatogenic cysts. While the smallest mature shark was only 80 cm long, all animals longer than 89 cm were sexually mature. The seasonal analysis of the testes indicated that mature spermatozoa dominated in testes during the first half of the year with a peak in May and June, after which followed less active period during July and August.

Genetic characterization of loggerhead turtle (Caretta caretta) individuals stranded and caught as bycatch from the North-Central Adriatic Sea

2010 ◽  
Vol 31 (1) ◽  
pp. 127-133 ◽  
Author(s):  
Fausto Tinti ◽  
Vincenzo Caputo ◽  
Silvia Franzellitti ◽  
Paola Nisi Cerioni ◽  
Carola Vallini ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Eastern Mediterranean ◽  
Genetic Relationships ◽  
Loggerhead Turtle ◽  
North Central ◽  
Mature Adults ◽  
The North ◽  
Control Region Sequences

AbstractThe North Adriatic Sea is considered a critical feeding and developmental area for Mediterranean loggerhead turtles. In this study, a comparative analysis of mitochondrial DNA control region sequences was carried out on sixty-five loggerhead individuals stranded and caught as bycatch in the Adriatic Sea from 1999 to 2002. We demonstrated the existence of genetic relationships between the North-Central Adriatic (NCA) aggregate and the Central-Eastern Mediterranean rookeries. Short-range and long-range migrations towards the Adriatic Sea were hypothesized by the finding of individuals bearing haplotypes endemic to the nesting populations of Greece and Turkey. The occurrence of individuals belonging to dimensional classes from juveniles to mature adults strongly support both the feeding and developmental role of the NCA.

scholarly journals Helminth Infection of the Loggerhead Sea Turtle Caretta caretta along the Coasts of Sicily and the North West Adriatic Sea

Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1408
Author(s):  
Antonino Gentile ◽  
Tullia Amato ◽  
Andrea Gustinelli ◽  
Maria Letizia Fioravanti ◽  
Delia Gambino ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Sea Turtles ◽  
Single Species ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
Helminth Parasites ◽  
Loggerhead Sea Turtles ◽  
Loggerhead Sea Turtle ◽  
North West ◽  
The North

We provide new data on the presence of helminth parasites in 64 individual loggerhead sea turtles Caretta caretta stranded along the coasts of Sicily and the northwest Adriatic Sea between June 2014 and August 2016. The necropsy examination revealed 31 individuals (48.4%) positive for endoparasites, showing a greater prevalence of trematodes than nematodes. In particular, seven species and a single genus of Trematoda (Hapalotrema) and a single species and genus of Nematoda (Kathlania) were identified. Among the Digenea flukes the species with the highest prevalence of infection were Rhytidodes gelatinosus (34.6%) and Hapalotrema sp. (33.3%), while among the Nematoda they were Kathlania sp. (33.3%) and Sulcascaris sulcata (33.3%). Analysis of variance (ANOVA) was applied among the recovery sites of the stranded loggerhead sea turtles and prevalence of endoparasites was used to highlight any relationship between the parasites and the origin of the hosts. ANOVA showed significant differences (p < 0.001) among the data used.

The commons tragedy in the North Sea brown shrimp fishery: how horizontal institutional interactions inhibit a self-governance structure

2017 ◽  
Vol 74 (7) ◽  
pp. 2004-2011 ◽  
Author(s):  
Josien Steenbergen ◽  
Brita K. Trapman ◽  
Nathalie A. Steins ◽  
Jan Jaap Poos
Keyword(s):  
Management Strategy ◽  
Self Regulation ◽  
Governance Structure ◽  
Fishing Effort ◽  
Brown Shrimp ◽  
Organizational Level ◽  
Self Management ◽  
Shrimp Fishery ◽  
The North ◽  
Harvest Control Rule

Abstract Self-regulation is now widely regarded as an effective mechanism for collective action aimed at sustainable management of common pool resources. The brown shrimp (Crangon crangon) fishing industry in the Netherlands has been working on the implementation of a self-management strategy since 2007, as part of its ambition to get certified to the Marine Stewardship Council standard. Part of the self-management strategy is the development of a harvest control rule for reducing fishing effort when catches are low. Until recently, these attempts failed. The failure of the initiatives for self-management is examined within Ostrom’s nested framework for understanding institutions for managing resource use. This framework emphasises the importance of strong vertical embeddedness of institutional arrangements for resource (co)management. Our analysis shows that, despite a strong vertical embeddedness, mismatches between different institutional frameworks at the same level (horizontal interaction) affect the performance of self-management at the organizational level. This inhibits the resource users’ collective actions to self-manage their brown shrimp fishery, leading to a potential commons tragedy.

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