scholarly journals The Response of a Predatory Fish, Ophiodon elongatus, to a Marine Protected Area: Variation in Diet, Catch Rates, and Size Composition

2016 ◽  
Author(s):  
Eric S Anderson
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Size Composition ◽  
Predatory Fish ◽  
Ophiodon Elongatus ◽  
Area Variation ◽  
Catch Rates

Influence of detection history and analytic tools on quantifying spatial ecology of a predatory fish in a marine protected area

2016 ◽  
Vol 562 ◽  
pp. 147-161 ◽  
Author(s):  
SL Becker ◽  
JT Finn ◽  
AJ Danylchuk ◽  
CG Pollock ◽  
Z Hillis-Starr ◽  
...  
Keyword(s):  
Protected Area ◽  
Spatial Ecology ◽  
Marine Protected Area ◽  
Predatory Fish

Monitoring Antarctic toothfish in McMurdo Sound to evaluate the Ross Sea region Marine Protected Area

2019 ◽  
Vol 31 (4) ◽  
pp. 195-207 ◽  
Author(s):  
S.J. Parker ◽  
S. Mormede ◽  
S.M. Hanchet ◽  
A. Devries ◽  
S. Canese ◽  
...  
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Ross Sea ◽  
Size Composition ◽  
Antarctic Toothfish ◽  
Mcmurdo Sound ◽  
Weddell Seals ◽  
Ecological Relationships ◽  
Dissostichus Mawsoni ◽  
Northern Areas

AbstractWe developed a random, stratified, vertical longline survey in McMurdo Sound, Antarctica, to compare the local age and size composition, diet and reproductive status of Antarctic toothfish (Dissostichus mawsoni) with those observed from a vessel-based survey of the southern Ross Sea shelf that includes a McMurdo Sound stratum. Results indicated that southern McMurdo Sound toothfish were larger and older than those a short distance away in northern McMurdo Sound. These data, in addition to recoveries of tagged fish, suggest that the large toothfish in McMurdo Sound may have limited mixing with the rest of the population. The potential effects of climate change and fishing in northern areas on toothfish abundance in McMurdo Sound will depend on the mechanism of toothfish recruitment to McMurdo Sound. Understanding the ecological relationships between McMurdo Sound toothfish and the larger population is required to predict these impacts. Furthermore, because toothfish predators (type C killer whalesOrcinus orca, Weddell sealsLeptonychotes weddellii) are abundant in the south-west margins of the Ross Sea, it is important to monitor toothfish in McMurdo Sound as part of the monitoring programme for the Ross Sea region Marine Protected Area.

scholarly journals Modelling fishing location choice and spatial behaviour of fishers near a marine protected area

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Riad Mohammed Sultan
Keyword(s):  
Indian Ocean ◽  
Production Function ◽  
Protected Area ◽  
Marine Protected Area ◽  
Location Choice ◽  
Spatial Behaviour ◽  
Content Type ◽  
The Indian Ocean ◽  
Catch Rates ◽  
Fishing The Line

PurposeThis study investigates whether higher catch rates near a marine protected area (MPA), and/or in other fishing areas within a choice set, attract more fishers. A survey conducted in the fishing grounds near an MPA located in south east of Mauritius in the Indian Ocean shows concentration of fishers in regions with lower catch rates. This contrasts with the predictions of the “fishing the line” hypothesis and the ideal free distribution (IFD) that fishers are likely to be attracted near the MPA with higher resource abundance.Design/methodology/approachUsing the random utility model as the framework and the random parameter logit (RPL) model, the study attempts to explain spatial behaviour of fishers. Expected catch and catch variability are modelled using the Just and Pope (JP) production function. The study also estimates effort elasticities with respect to expected catch and catch variability and simulates the relocation of effort from area closure.FindingsThe paper concludes that higher catch does attract fishers but is a partial and very restrictive explanation of fishers' behaviour. The “fishing the line” hypothesis does hold to some extent, but it should not be taken for granted that rising catch rates in adjacent waters will increase fishing pressure. The paper concludes that factors such as catch variability, distance from homeport to fishing ground, potential physical risk and attitudes towards risk of fishers affect spatial behaviour of fishers and should be considered for the placement and size of MPAs. The study also finds that the responsiveness of effort to catch rates is lowest in areas which are already heavily fished and easily accessible.Practical implicationsThe identification of fishing areas as complements (when fishing in one area increases fishing effort in another) and substitutes is valuable information for determining the placement and size of an MPA. A larger reserve is likely to have more displacement effect in this case than a smaller one. Therefore, a small or a network of a small reserve may be appropriate. The premise to select the site and size of the reserve is to avoid overconcentration of fishers in alternative fishing areas, which can be vulnerable to excessive fishing and unintended effects from fishers.Originality/valueThe paper contributes to an understanding of fishing behaviour and its impact on the configuration of marine reserves. It discusses the importance of effort elasticities to determine the placement and size of an MPA. Studies on this topic are very scanty in the Indian Ocean region. It also shows the application of location choice model, the RPL model and the JP production function in the fisheries sector for a small island.

scholarly journals Density and distribution of Patella ferruginea in a Marine Protected Area (western Sardinia, Italy): Constraint analysis for population conservation

2012 ◽  
Vol 13 (1) ◽  
pp. 108 ◽  
Author(s):  
S. COPPA ◽  
G.A. DE LUCIA ◽  
G. MASSARO ◽  
P. MAGNI
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Size Composition ◽  
Main Risk Factor ◽  
Entry Zone ◽  
Constraint Analysis ◽  
Population Conservation ◽  
Negative Effect ◽  
Endangered Population ◽  
Patella Ferruginea

The endemic limpet Patella ferruginea is the most endangered invertebrate of the Mediterranean Sea. Our study examined a population of P. ferruginea in the Marine Protected Area of Penisola del Sinis - Isola di Mal di Ventre (western Sardinia, Italy). During the summer 2009, we carried out a systematic census of P. ferruginea along a 8114 m georeferenced perimeter of coast in the no take-no entry zone to assess its density, spatial distribution, and morphometric characteristics. Our aim was to provide a detailed map of the distribution of P. ferruginea and to investigate the effects of accessibility, wave exposure and slope of the coast on its occurrence. Patella ferrugineashowed the lowest mean density ever reported (0.02 ind/m) and a unimodal population structure characterised by fewer females and juveniles. Accessibility had a major negative effect on the occurrence of P. ferruginea. Exposure was also an important factor in influencing its density, size composition and specimen position within the mesolittoral, while the slope had little influence. Morphometric analysis showed the dominance of the Rouxi form, while the Lamarcki form was confined to exposed sites. Our results demonstrate a highly endangered population of P. ferruginea and suggest that human pressure represents the main risk factor.

Seagrass amphipod assemblages in a Mediterranean marine protected area: a multiscale approach

2014 ◽  
Vol 506 ◽  
pp. 175-192 ◽  
Author(s):  
N Sturaro ◽  
G Lepoint ◽  
A Pérez-Perera ◽  
S Vermeulen ◽  
P Panzalis ◽  
...  
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Multiscale Approach

Habitat use of toothed whales in a marine protected area based on point process models

2019 ◽  
Vol 609 ◽  
pp. 239-256 ◽  
Author(s):  
TL Silva ◽  
G Fay ◽  
TA Mooney ◽  
J Robbins ◽  
MT Weinrich ◽  
...  
Keyword(s):  
Habitat Use ◽  
Point Process ◽  
Protected Area ◽  
Marine Protected Area ◽  
Process Models ◽  
Point Process Models

What Values Do Tourists Place on a Marine Protected Area? White Shark Cage-Dive Tourists and the Neptune Islands

2019 ◽  
Vol 14 (1) ◽  
pp. 19-30 ◽  
Author(s):  
Kirin Apps ◽  
Kay Dimmock ◽  
David J. Lloyd ◽  
Charlie Huveneers
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
White Shark
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