The burying behavior of the mole crabs before and after an accident with urban sewage efluents in Bombinhas Beach, Santa Catarina, Brazil

Abstract

The burying behavior of the mole crabs before and after an accident with urban sewage efluents in Bombinhas Beach, Santa Catarina, Brazil ABSTRACTSeveral environmental factors may interfere in the behavior of mole crab (Emerita brasiliensis Schmitt, 1935), such as the discharge of urban pollutants on the shore, which can be toxic. During a study of the impact of human activities on a beach in Southern Brazil, opportunistically it was tested if burying behavior of the mole crab were affected after an accident causing the discharge of urban effluents. When comparing the period before (two days) and after (one day) the accident, there was a substantial increase in the concentration of ammonia in the seawater, but pH, water temperature, salinity, and the microclimatic conditions remained stable. During the increased ammonia phase, we captured individuals of smaller size, but the latency in an burying test conducted in an aquarium, immediately after the capture, remained unaltered. The discharge of organic pollutants seems affected the surf zone, where small individuals were more abundant, supposedly males and juveniles but not adult females. The maintenance of burying latency by males and juveniles seems to suggest a greater physiological resistance to a short term contamination by ammonia.Keywords: Burying; mole crab; Emerita brasiliensis; pollution effects; sewage. O comportamento de enterramento de tatuís antes e após um acidente com efluentes de esgoto urbano na praia de bombinhas, Santa Catarina, Brasil RESUMOMuitos fatores ambientais podem interferir no comportamento dos tatuís (Emerita brasiliensis Schmitt, 1935) como os poluentes urbanos na orla, que podem ser tóxicos. Durante um estudo do impacto de atividades humanas sobre uma praia no sul do Brasil, observou-se de forma oportuna se o comportamento de enterramento dos tatuís foi alterado após a descarga de poluentes de esgoto urbano. Quando comparando os dois primeiros dias com o último dia de observações, a concentração de amônia na água do mar aumentou substancialmente, mas o pH, a temperatura da água, a salinidade e as condições BOERE, V.; CANSI, E. R.; ALVARENGA, A. B. B.; SILVA, I. O. The burying behavior of the mole crabs before and after an accident with urban sewage efluents in Bombinhas Beach, Santa Catarina, Brazil. AmbiAgua, Taubaté, v. 6, n. 3, p. 70-76, 2011. (http://dx.doi.org/10.4136/ambi-agua.627) 71 microclimáticas permaneceram estáveis. Durante a fase de aumento da amônia capturaram -se indivíduos menores, mas a latência de enterramento testada em um aquário imediatamente após a captura permaneceu inalterada. A descarga de poluentes orgânicos parece afetar a zona de surfatação em que indivíduos menores foram mais abundantes, supostamente machos e juvenis, sem fêmeas adultas. A manutenção da latência de enterramento por machos e juvenis sugere uma resistência maior para uma contaminação de curto prazo de amônia.Palavras-chave: enterramento; Tatuí; Emerita brasiliensis; efeitos de poluição; esgoto.

Local urbanization impacts sandy beach macrofauna communities over time

“…This genus plays an important role as a bioindicator of chemical and organic pollution on sandy beaches. Mole crabs are negatively affected by urban sewage effluents (Boere et al, 2011), accumulate high concentrations of algal toxins (Ferdin et al, 2002;Powell et al, 2002), and heavy metals (Cabrini et al, 2017). The Emerita genus (Stimpson 1857) can also accumulate microplastics (Horn et al, 2019).…”

ANALISIS DENSITAS Emerita emeritus TERHADAP TEKSTUR DAN BAHAN ORGANIK SEDIMEN DI PANTAI GLAGAH, KULON PROGO, YOGYAKARTA

“…Kegiatan penangkapan yang tidak terkendali dapat mengancam keberadaan dan mengganggu fungsi ekologi undur-undur laut tersebut. Mengingat data dan informasi tentang undur-undur laut di perairan Indonesia masih sangat terbatas, padahal undur-undur laut memiliki nilai ekonomis dan ekologis penting, diantaranya juga merupakan sumber daya penting dalam siklus rantai makanan yang dalam trofik level merupakan konsumen tingkat awal di daerah pantai berpasir (Hurband & Dugan 2003in Boere et al 2011, maka penelitian tentang analisis densitas undurundur laut berkaitan dengan faktor lingkungan yang ada seperti keadaan sedimen, bahan organik, tekstur, dan aspek pertumbuhannya sangat penting untuk dilakukan. Apalagi Emerita emeritus yang memiliki tingkat penangkapan cukup tinggi.…”

ASPEK PERTUMBUHAN UNDUR-UNDUR LAUT, Emerita emeritus DARI PANTAI BERPASIR KABUPATEN KEBUMEN

“…Penelitian undur-undur laut yang pernah dilakukan di Indonesia yang terpublikasi ilmiah baru penelitian tentang kandungan omega-6 pada undur-undur laut (Mursyidin 2007). Mengingat data dan informasi tentang undur-undur laut perairan Indonesia masih sangat terbatas, padahal undur-undur laut memiliki nilai ekonomis dan ekologis penting, diantaranya juga merupakan sumber daya penting dalam siklus rantai makanan yang dalam trofik level merupakan konsumen tingkat awal di daerah pantai berpasir (Rodgers 1778;Lercari & Defeo 1999;Hurband & Dugan 2003in Boere et al 2011, maka penelitian tentang aspek biologi undur-undur laut penting untuk dilakukan. Salah satu aspek biologi yang cukup penting untuk diteliti adalah aspek pertumbuhan undur-undur laut.Informasi pola pertumbuhan undur-undur laut dapat dijadikan salah satu dasar dalam mengelola pemanfaatan undur-undur laut agar tetap lestari, baik secara ekonomi maupun ekologi.…”