Pubblicazione scientifica

Perceived socio-economic impacts of the marbled crayfish invasion in Madagascar

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità

RIASSUNTO

The negative environmental and economic impacts of many invasive species are well known. However, given the increased homogenization of global biota, and the difficulty of eradicating species once established, a balanced approach to considering the impacts of invasive species is needed. The marbled crayfish (Procambarus virginalis) is a parthenogenetic freshwater crayfish that was first observed in Madagascar around 2005 and has spread rapidly. We present the results of a socio-economic survey (n = 385) in three regions of Madagascar that vary in terms of when the marbled crayfish first arrived. Respondents generally considered marbled crayfish to have a negative impact on rice agriculture and fishing, however the animals were seen as making a positive contribution to household economy and food security. Regression modeling showed that respondents in regions with longer experience of marbled crayfish have more positive perceptions. Unsurprisingly, considering the perception that crayfish negatively impact rice agriculture, those not involved in crayfish harvesting and trading had more negative views towards the crayfish than those involved in crayfish-related activities. Food preference ranking and market surveys revealed the acceptance of marbled crayfish as a cheap source of animal protein; a clear positive in a country with widespread malnutrition. While data on biodiversity impacts of the marbled crayfish invasion in Madagascar are still completely lacking, this study provides insight into the socio-economic impacts of the dramatic spread of this unique invasive species. “Biby kely tsy fantam-piaviana, mahavelona fianakaviana” (a small animal coming from who knows where which supports the needs of the family). Government worker Analamanga, Madagascar.

DATA

Data di pubblicazione: 15/04/2020

AUTORI

ANDRIANTSOA RANJA
JONES JULIA P G
ACHIMESCU VLAD
RANDRIANARISON HERINIAINA
RASELIMANANA MIARY
ANDRIATSITOHAINA MANJARY
RASAMY JEANNE
LYKO FRANK

ENTE DI AFFERENZA

EPIGENETICS DKFZ ZMBH ALLIANCE GERMAN CANCER RSCH CTR DKFZ HEIDELBERG GERMANY
SCHOOL OF NATURAL SCIENCE BANGOR UNIV BANGOR UK
SCHOOL OF SOCIAL SCIENCE MANNHEIM UNIV MANNHEIM GERMANY
MENTION ZOOLOGIE ET BIODIVERSITE ANIMALE UNIVERSITE D’ANTANANARIVO ANTANANARIVO MADAGASCAR
SVERIGES LANDBRUKSUNIVERSITET CAMPUS UMEA SWEDEN

RIVISTA

PLoS ONE, 15(4), e0231773

IMPACT FACTOR

2,870

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