Tag: fisheries

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Occurrence and impact of interactions between small-scale fisheries and predators, with focus on Mediterranean monk seals (Monachus monachus Hermann 1779), around Lipsi Island complex, Aegean Sea, Greece

Recent Publications

Non-open access journalsNoelia Ríos, Matija Drakulic, Iosu Paradinasb, Anastasia Milliou, Ruth Cox. 2017. Occurrence and impact of interactions between small-scale fisheries and predators, with focus on Mediterranean monk seals (Monachus monachus Hermann 1779), around Lipsi Island complex, Aegean Sea, Greece. Fisheries Research 187: 1-10. https://dx.doi.org/10.1016/j.fishres.2016.10.013

Abstract
Antagonistic interaction between Mediterranean marine mammals, including the endangered monk seal (Monachus monachus), and small-scale fisheries is a growing problem in the Aegean Sea. Effective management measures are needed to ensure both the survival of the monk seal population, and its coexistence with the small-scale fisheries. In this study, data from 371 fishing journeys by 8 different boats was collected between March and November 2014. Evidence of depredation by monk seals was recorded in 19.1% of fishing journeys, by cetaceans in 5%, and by other predators in 16.5%. Analysis of landings data showed that gear and depth were the variables most likely to influence the occurrence of depredation. There was a significant decrease in the catch per unit effort (CPUE) of four of the nine targeted fish species when depredation by monk seals occurred. The total cost of monk seal depredation was estimated to be 21.33% of the mean annual income of fishermen in the Aegean Sea. We discuss how the implementation of marine protected areas and the use of specific fishing gear could reduce the frequency of interactions, and thus mitigate the loss experienced by the fisheries as well as contribute to the conservation of an endangered species.

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Croatian monk seal Adriana may have been shot twice during her lifetime

Further examination of the body of female Mediterranean monk seal Adriana, who died on 25 August 2014 in Croatia, has revealed that she was shot at twice, in all probability many years earlier, according to press reports and Jasna Antolović of Croatia’s Mediterranean Monk Seal Group. Continue reading “Croatian monk seal Adriana may have been shot twice during her lifetime”

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Monk seal fisheries interactions

Recent Publications

González, Luis Mariano and de Larrinoa, Pablo Fernández. 2012. Mediterranean monk seal Monachus monachus distribution and fisheries interactions in the Atlantic Sahara during the second half of the 20th century: 1-9. DOI: 10.1515/mammalia-2012-0046, October 2012. [Online purchase €30 / $42]

Abstract

The most important surviving colony of the critically endangered Mediterranean monk seal (Monachus monachus) inhabits the Atlantic Saharan coast. The population has not recovered despite the cessation of commercial sealing in the second half of the 20th century. We report the distribution of the monk seals within the region from 1940 to 1989 and their interactions with fisheries, from data gathered through interviews of fishermen. Our study shows a notable decrease in the seals’ range during the study period. Observations of seals on open beaches and exposed rocks decreased, while observations in caves increased. Important negative interactions between monk seals and fisheries were detected, with the most frequent interactions being bycatch in gillnets and bottom trawl nets. Reports obtained from fishermen clearly indicate that the seals were still being deliberately killed on land during the 20th century, which likely caused the extirpation of seal populations hauling out on beaches. We recommend that mortality due to fishery bycatch be added as a contributing factor to the decline of the monk seal populations in the region from 1940 to 1989. We also recommend conservation measures such as the establishment of a permanent marine reserve along the Atlantic Coast of the Cap Blanc Peninsula.

Keywords: Atlantic Sahara; distribution; endangered species; Mediterranean monk seal; seal-fishery interactions.

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DLNR, NOAA urge reporting of monk seal incidents

News Release, Department of Land and Natural Resources, Hawaii, 11 May 2012

The Department of Land and Natural Resources (DLNR) and NOAA Fisheries announced this week that since March 2012, NOAA Fisheries, DLNR, and partners have responded to five seal hooking incidents involving four individual Hawaiian monk seals. Three of these responses are still in progress.

NOAA and DLNR would like to take this opportunity to remind fishermen that monk seal deaths and injuries from fishing interactions can often be prevented, and adverse impacts to fishermen and seals can be reduced through early reporting of incidents.

“Monk seals are a vital part of Hawai‘i’s marine and cultural environment,” said William J. Aila, Jr., DLNR Chairperson. “While DLNR and NOAA seek to address all adverse impacts on Hawaiian monk seals, we want to acknowledge the cooperation of Hawai‘i fishermen and emphasize that we do not consider fishing interactions in the main Hawaiian Islands to currently pose a major threat to monk seal recovery.”

NOAA Fisheries Service data indicate that a total of 77 hooking incidents have been reported over the past 10 years, with at total of nine incidents in 2011 and eight incidents reported thus far in 2012 (including the five incidents discussed here). [More]

Source: DLNR, NOAA ask for fishermen’s kokua in reporting monk seal hooking or entanglements, News Release, Department of Land and Natural Resources, Hawaii, 11 May 2012 (PDF).

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Vancouver Aquarium veterinarian assists in monk seal surgery

Media Watch, Vancouver Aquarium, 11 May 2012
Dr. Haulena gives endangered monk seal anaesthesia for surgical procedure (NOAA)

Vancouver Aquarium veterinarian, Dr. Martin Haulena, received an emergency call on May 9 to fly to Hawaii to help support a local rescue effort.

He participated in two successful procedures to remove accidentally-ingested fishing hooks from endangered monk seals on May 10.

One of the monk seals required surgery to remove the hook, which was lodged deep in the esophagus near the opening to the stomach. Dr. Haulena performed the anesthesia and collaborated with Dr. Robert Braun and veterinarians at the Honolulu Zoo to remove the hook. The seal is in recovery and rehabilitation is expected to take several days to weeks. [More]

Source: Aquarium veterinarian helps save monk seals, Vancouver Aquarium, 11 May 2012.

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Monk seal death in Libya

Ibrahem Benamer, Natural Resources and Environmental Science,
Omar Mukhtar University (OMU), El-beida, Libya

On the 25 March in the area of Ain Gazzalla (Northeast Libya near the Egyptian border, 32.23284 N, 23.2848 E) a group of fishermen found a dead female monk seal trapped in their net. The case was reported to the coastguard who in turn informed the National Marine Laboratory. The carcass is now in their possession at the Lab and an autopsy is being arranged during this week.

This event is the only confirmed case of monk seal existence in eastern Libya since Norris 1972 [Norris, W.J.T. 1972. Monk Seals in Libya. Oryx 11: 328-330.], which may indicate that this critically endangered species can still be found in the area or close by, which will support the importance of the area as an MPA.

A report will be issued after the autopsy; meanwhile, pictures taken by the fishermen can be found on Flickr.