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Pinna rudis Linnaeus, 1758 (Bivalvia: Pinnidae) has an Atlantic-Mediterranean distribution. Habitat degradation is considered the main cause of population declines in the recent past, raising the conservation status of the species to the category of vulnerable in some places. Population dynamics studies of P. rudis are still necessary to fully understand its conservation requirements. Moreover, new methods of individual data collection should be developed as individuals are highly sensitive to extraction and manipulation. In the present study, we propose a non-invasive method to collect P. rudis morphometric data in situ. For this, we sampled 900 m2 of the sea bed at Matiota Beach on São Vicente Island, Cabo Verde Archipelago, and collected 18 individuals to compute the relationship between shell length and width. The regression equation between the parameters allowed us to estimate the total size of 59 P. rudis individuals obtained from the beach. The non-invasive method adopted allowed determination of the total size of the individuals without removing them from the substratum and, thereby, allowing the comparative study of the species in different zones.
Based on six weeks spent in the field on six Cabo Verdean Islands in September/ October 2016 and 2017, we present 18 additions to the checklist of terrestrial biodiversity of the archipelago (ten arthropods, one bird, two fungi, and five flowering plants). Four of them are first records for Cabo Verde, the others for particular islands. Most interesting are the apple of Sodom fruit fly Dacus longistylus, perhaps actively introduced for biocontrol of the toxic apple of Sodom tree and the additions to the distribution of several bee species of the genera Amegilla, Megachile, and Xylocopa. Our observations indicate that the biodiversity of Cabo Verde is still incompletely known and more fieldwork is needed.
The West African region possesses one of the largest knowledge gaps in the distribution and taxonomy of all species, especially inconspicuous ones. This work presents one of the few bat studies ever carried out in the Cabo Verde Islands. Knowledge on the distribution of the seven species recorded in this remote archipelago is still very scarce and with very low resolution (many at island level), so new records are expectable and invaluable for the establishment of conservation policies. A review on the scattered and digitally unavailable (due to the old date of publication) knowledge of the Cabo Verde bat fauna with the first bat records for two islands and new occurrence data for two species on three islands is presented. It is expected that this work can constitute a reference for future bat works in the region, while providing acoustic data that can easily be updated upon future taxonomic revisions.
Untapped potential
(2018)
This first number of the seventh volume of Zoologia Caboverdiana is focussed on two groups of organisms that remain largely understudied in Cabo Verde. We are namely referring to mammals, both terrestrial and aquatic, and to terrestrial invertebrates. Two original articles and a short note, by authors from five different nationalities, including Cabo-Verdean, consolidate the vitality of this peer-reviewed journal.
Muito potencial
(2018)
No primeiro número do sétimo volume desta revista dedicamos a nossa atenção a dois grupos de organismos pouco estudados em Cabo Verde. Referimo-nos nomeadamente aos mamíferos, tanto terrestres como marinhos, e aos invertebrados terrestres. Este número consolida ainda a vitalidade desta revista com revisão por pares, com dois artigos originais e uma nota breve de autores de cinco nacionalidades diferentes, incluindo a cabo-verdiana.
Of the circa 25 species of butterfly species occurring in the Cabo Verde Archipelago, only one species is endemic: Chilades evorae (Lycaenidae). The species was reared by the authors and colour photographs of the early stages of this species are presented for the first time. The host-plants on the islands of Santo Antão, São Vicente, and Santa Luzia are illustrated with photographs. The butterfly is reported from Raso for the first time, together with a potential host-plant. A tachinid fly species Cadurciella sp. parasitising C. evorae is also reported.
Gervais’ beaked whale Mesoplodon europaeus (Gervais, 1855) is restricted to the Atlantic Ocean. Although most records are from the North Atlantic, it is probably continuously distributed in deep warm waters around the equator (Mead 1989, Norman & Mead 2001). Its occurrence in West Africa is poorly known, as records are rare. It is classified as Data Deficient (Taylor et al. 2008).
It is with great joy and imbued with the contagious Christmas spirit lived in Macaronesia that I present the second issue of the sixth volume of this journal. This issue consolidates the new path tracked the beginning of 2016, which focused on the renewal of the editorial board and the broadening of the scope of the journal to new scientific areas.
É com grande alegria, e imbuída do contagiante espírito Natalício que se vive na Macaronésia, que apresento o segundo número do sexto volume desta revista. Este número consolida o novo rumo traçado no início de 2016, que apostou na renovação do corpo editorial e na ampliação do âmbito da revista para novas áreas científicas.
DNA sequences disclose a new species of Africonus cone snail from São Vicente (Gastropoda: Conidae)
(2017)
The sequencing of complete mitochondrial genomes of cone species belonging to the (sub)genus Africonus, which is endemic to Cabo Verde, has allowed the reconstruction of phylogenetic relationships among these species, as well as delimitation and validation of their taxonomic status. While several species were found to be synonyms, some populations had enough DNA sequence divergence to merit the species status. This is the case of some populations inhabiting São Vicente, which are hereby described as a new species. The new species shares similarity in shell morphology to Africonus miruchae (Röckel, Rolán & Monteiro, 1980), endemic to Sal, due to convergence, and with Africonus denizi Afonso & Tenorio, 2011, endemic to São Vicente, due to close phylogenetic relationship. Additionally, the three species have significant differences in radular morphology.
The population size and distribution of Phaethon aethereus on Raso Islet was studied from August to December 2016. In total, 42 biometric measures were collected from 38 adults and four juveniles. No recapture was identified although some individuals were ringed in 2014. The means of biometrics variables obtained for the different body segments and eggs were within the ranges of P. aethereus mesonauta from tropical North Atlantic. The two largest agglomerations of P. aethereus identified on Raso were overlapping colonies of brown boobies Sula leucogaster which allowed the maximum direct count of only 90 individuals. The inaccessibility of some breeding areas conditioned the identification and monitoring of just 117 nests. Thus, we estimate the population by the number of nests in more than 100 pairs. However, without an annual census, it is difficult to estimate the population size of this species. So, annual studies are recommended to better understand the population dynamics of P. aethereus on Raso.
First record of a live false killer whale Pseudorca crassidens (Owen, 1846) in Cabo Verdean waters
(2017)
Despite the limited research on cetaceans in Cabo Verde waters, 23 species have been documented (Hazevoet & Wenzel 2000, Hazevoet et al. 2010, Koenen et al. 2013, Berrow et al. 2015). The presence of several species is known only from strandings, such as the false killer whale, which has beached dead twice on Boavista in the 1980s–1990s, and again in 2007 (Hazevoet et al. 2010, Koenen et al. 2013). This is a CITES species, and Data Deficient according to IUCN (Taylor et al. 2008).
Red-billed tropicbirds (Phaethon aethereus) are distributed throughout the tropical waters of the Eastern Pacific, the Northwest Indian Ocean and the Atlantic Ocean; in the latter, the species is represented by P. a. mesonauta (Del Hoyo et al. 1992). The brown booby (Sula leucogaster) is the species with the largest distribution within the Sulidae (Patterson et al. 2011) with breeding sites across the Atlantic, Indian and Pacific oceans (Morris-Pocock et al. 2010).
Mobulinae rays are part of Cabo Verde native biodiversity and belong to two extant genera, Manta and Mobula (Paig-Tran et al. 2013, Ward-Paige et al. 2013). Mobula spp. can be distinguished from Manta spp. by the mouth position, the shape of the cephalic fins and body size (Stevens 2011). Despite their large size, little is known about their population trends and precise distribution. They are particularly difficult to study in the wild and have restricted distributions (Ward-Paige et al. 2013, Croll et al. 2015).
A ideia da implantação de uma sociedade científica em Cabo Verde no campo da Zoologia nasce por iniciativa do Doutor Cornelis J. Hazevoet, biólogo holandês com residência em Portugal que tem vindo a estudar a biodiversidade das ilhas de Cabo Verde desde os anos 80. A investigação de Hazevoet tem tido como enfoque principal a filogeografia da avifauna e mamíferos marinhos, abrangendo ainda áreas da Biogeografia, Sistemática e Evolução com suporte na Paleontologia.
The idea of setting up a scientific society in Cabo Verde in the field of Zoology was born on the initiative of Dr Cornelis J. Hazevoet, a Dutch biologist living in Portugal who has been studying the biodiversity of the Cabo Verde Islands since the 1980s. Hazevoet’s research has mainly focused on the phylogeography of avian fauna and marine mammals, and to a lesser extent in areas of Biogeography, Systematics and Evolution from a Paleontological framework.
Parasites represent one of the most abundant lifestyles, and yet, only a small portion is described (Dobson et al. 2008). Cabo Verde parasitofauna is mostly unknown and the only study on parasites infecting reptiles, in which a new species of nematodes is referred, highlights the presence of unrecognized taxa (Jorge et al. 2012).
In Volume 5, Number 2, of Zoologia Caboverdiana, Richard Porter and Tony Prater reassessed the two existing records of Baird’s sandpiper Calidris bairdii for Cabo Verde, concluding that both were misidentified, based on the respective photographs in the 6th and 8th Cabo Verde Bird Reports (Hazevoet 2010, 2014).
The authors carried out a survey of butterflies on 12 of the Cape Verde Islands from 29 October to 18 December 2013. During the survey records were also made of the few hawk-moths (Lepidoptera: Sphingidae) encountered during the day, or feeding at flowers at dusk and dawn. None was collected at light. Since several of our records are believed to be new island records, we present them here. The few voucher specimens collected have been deposited in the Natural History Museum, London.
A survey of butterfly species was carried out on 12 islands of the Cape Verde archipelago (Brava, Cima, Fogo, Santiago, Maio, Boa Vista, Sal, São Nicolau, Raso, Santa Luzia, São Vicente, Santo Antão) during almost eight weeks in 2013. Results include the discovery of six species not previously recorded from the islands: Vanessa atalanta, V. vulcania, Junonia oenone, Danaus plexippus, Eurema brigitta and Azanus ubaldus. Known island distribution of some resident species is extended. Status of some long-standing (and questionable) historical records and probable misidentifications are discussed in detail. Data are presented with regard to habitat, habits and host-plants of all taxa, together with a table of species, islands, status and probable original geographical source. Entomological data from Cambridge University ornithological research on Raso between 2006 and 2014 are also included. Comment is made with regard to whether butterfly studies support inclusion of the Cape Verde Islands in ‘Macaronesia’ sensu lato.