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Anales del Instituto de la Patagonia

versão On-line ISSN 0718-686X

Resumo

MEDINA, Álvaro; FIGUEROA, Tania  e  CANETE, Juan I.. Caprella ungulina Mayer, 1903 (Amphipoda: Caprellidae): epizoan of Paralomis granulosa (Hombron & Jacquinot, 1846) (Decapoda: Lithodidae) in Magellan waters, Chile. Anales Instituto Patagonia (Chile) [online]. 2017, vol.45, n.1, pp.17-29. ISSN 0718-686X.  http://dx.doi.org/10.4067/S0718-686X2017000100017.

Caprella ungulina Mayer, 1903 is recorded from shallow waters (50 to 100 m depth) off Navarino Island (55°03’ S, 67°33’ W) and Dawson Island (54°04’ S, 70°24’ W), austral Chile. The material examined (N=289 caprellids) was collected mainly in the mouthparts (55%) of the edible crustacean Paralomis granulosa during 2016 fishery season. The percentage of epibiosis varied between 1.8 and 14.8% of the total host sampled, being collected mainly one caprellid by crab. The mortality of C. ungulina by effects of the P granulosa fishery during 2015 in Magallanes (l,965 ton) produced between 255,450 and 1,061,100 specimens (mean epibiosis of 6.7% ± 4,1%). The mortality by fishing on P granulosa could affect negatively the population dynamic of C. ungulina if is confirmed a high specificity for this biohabitat and the remotion of juveniles that could not reach the reproductive maturity. It is proposed that the ecological relationship between C. ungulina and P granulosa could be defined as comensalism under the following reasons: 1) the guest is largest than the species hosted, 2) the relatively specific relationship between both species, 3) use of food waste provided by the host, 4) use of host as a cryptic habitat, 5) the contribution in transport of the host and 6) physical shelter.

Palavras-chave : Caprellidae; Caprella ungulina; epibiosis; Paralomis granulosa; marine subantarctic bentos; incidental mortality for fishery; commensalism.

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