00584nas a2200121 4500008004100000245017900041210006900220260004800289300000800337490000800345100001800353856009100371 2019 eng d00aGenome and karyotype evolution underlying speciation and diversification of electric organ discharges in African weakly electric fish (Campylomormyrus, Mormyridae, Teleostei)0 aGenome and karyotype evolution underlying speciation and diversi aPotsdambUniversity of Potsdamc22 May 2019 a1120 vPhD1 aCanitz, Julia uhttps://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/year/2020/docId/4430502403nas a2200169 4500008004100000022001400041245016900055210006900224260001600293520156200309100003201871700002101903700001501924700002601939700002101965856024701986 2019 eng d a0022-111200aThe Cyphomyrus Myers 1960 (Osteoglossiformes: Mormyridae) of the Lufira Basin (Upper Lualaba: DR Congo): a generic reassignment and the description of a new species0 aCyphomyrus Myers 1960 Osteoglossiformes Mormyridae of the Lufira cJul-12-20203 a

Within a comparative morphological framework, Hippopotamyrus aelsbroecki, only known from the holotype originating from Lubumbashi, most probably the Lubumbashi River, a left bank subaffluent of the Luapula River, is reallocated to the genus Cyphomyrus. This transfer is motivated by the fact that H. aelsbroecki possesses a rounded or vaulted predorsal profile, an insertion of the dorsal fin far anterior to the level of the insertion of the anal fin, and a compact, laterally compressed and deep body. In addition, a new species of Cyphomyrus is described from the Lufira basin, Cyphomyrus lufirae. Cyphomyrus lufirae was collected in large parts of the Middle Lufira, upstream of the Kyubo Falls and just downstream of these falls in the lower Lufira and its nearby left bank affluent, the Luvilombo River. The new species is distinguished from all its congeners, that is, firstly, from C. aelsbroecki, C. cubangoensis and C. discorhynchus, by a low number of dorsal fin rays, 27-32 (vs. higher, 36 (37), 34 (33-41) an 38 (38-40), respectively) and, secondly, from C. aelsbroecki, C. cubangoensis, and C. discorhynchus by a large prepelvic distance, 41.0–43.8% LS (vs. shorter, 39.7%, 38.9–39.1% and 37.0–41.0% LS, respectively). The description of yet another new species for the Upemba National Park and the Kundelungu National Park further highlights their importance for fish protection and conservation in the area. Hence, there is an urgent need for the full integration of fish into the management plans of these parks.

1 aMukweze Mulelenu, Christian1 aKatemo Manda, B.1 aDecru, Eva1 aChocha Manda, Auguste1 aVreven, Emmanuel uhttps://onlinelibrary.wiley.com/doi/abs/10.1111/jfb.14237https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.14237https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.14237https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.1423702686nas a2200169 4500008004100000022001400041245009600055210006900151260001600220520211300236100002302349700001802372700002802390700001502418700002102433856006202454 2019 eng d a0022-111200aHidden species diversity in Marcusenius moorii (Teleostei: Mormyridae) from the Congo Basin0 aHidden species diversity in Marcusenius moorii Teleostei Mormyri cSep-12-20193 a

New collections from the Yangambi Biosphere Reserve (YBR) and Okapi Wildlife Reserve (OWR) revealed the presence of two groups of specimens similar to, but different from Marcusenius moorii. To study both these groups, an integrated morphological and genetic (mtDNA, cytb) approach was used. This study revealed that one of the two groups is conspecific with Marcusenius lambouri, a junior synonym of M. moorii, which is herein revalidated, with M. moorii longulus as its junior synonym. Marcusenius lambouri differs from M. moorii by a higher number of lateral line scales (44–46 vs. 40–43), a shorter pectoral‐fin length (14.6–19.9 vs. 20.3–25.2% standard length; LS) and a more elongated body due to a usually shallower middle body depth (19.8–26.5 vs. 26.3–35.9% LS). The other group revealed to be a new species for science, Marcusenius verheyenorum, which can be distinguished from its congeners with eight circumpeduncular scales by the following unique combination of characters: a rounded head with a terminal mouth; a short and deep caudal peduncle (middle caudal‐peduncle depth, 44.9–54.6% caudal‐peduncle length; LCP), a deep body (middle body depth, 27.7–34.2% LS), 38–43 scales on the lateral line, 40–41 vertebrae, 20–21 dorsal‐fin rays and 26 anal‐fin rays. Some specimens previously attributed to M. moorii were examined and reassigned to M. lambouri or M. verheyenorum. As a result, M. moorii and M. lambouri occur in sympatry in the middle Congo Basin, with the distribution area of M. moorii still further extending into the lower Congo Basin. Instead, the distribution of M. verheyenorum is limited to some right bank tributaries of the upstream part of the middle Congo Basin. Two museum records from the Lilanda River (YBR), collected in the 1950s and previously identified as M. moorii, were re‐identified as belonging to the new species, M. verheyenorum. However, the species now seems locally extinct in that region, which reflects the significant anthropogenic effects even within this reserve.

1 aMambo Baba, Taylor1 aKisekelwa, T.1 aDanadu Mizani, Celestin1 aDecru, Eva1 aVreven, Emmanuel uhttps://onlinelibrary.wiley.com/doi/abs/10.1111/jfb.1422600585nam a2200181 4500008004100000020002200041245006000063210005900123260004400182300001400226653001100240100002300251700002000274700002000294700001800314700001600332856005500348 2019 eng d a978-3-030-03082-700aBiodiversity of Angola: The Freshwater Fishes of Angola0 aBiodiversity of Angola The Freshwater Fishes of Angola aChambSpringer International Publishing a207 - 24210aAngola1 aHuntley, Brian, J.1 aRusso, Vladimir1 aLages, Fernanda1 aFerrand, Nuno1 aSkelton, P. uhttp://link.springer.com/10.1007/978-3-030-03083-402511nas a2200157 4500008004100000022001500041245013600056210006900192260001600261490000900277520182700286100001502113700002202128700002102150856018202171 2019 eng d a0936-9902 00aMarcusenius wamuinii (Teleostei: Mormyridae), a new elephantfish from the Mangroves National Park, Democratic Republic of the Congo0 aMarcusenius wamuinii Teleostei Mormyridae a new elephantfish fro c15 May 20190 v10903 a

Marcusenius wamuinii, a new large-scaled Marcusenius species, is described from the Mangroves National Park (MNP), a protected area situated at the mouth of the Lower Congo basin and its surroundings in the DR Congo. It can be distinguished from all its congeners based on the following unique combination of characteristics: 8 circumpeduncular scales, 27-31 anal-fin rays, 22-25 dorsal-fin rays, 19-22 scales between dorsal and anal fin, 46-53 lateral line scales, and a slender caudal peduncle (depth 4.4-5.9 % SL). Its status as a distinct species is ad- ditionally confirmed by genetic data from the mitochondrial cytochrome b gene. This is the first new fish species discovered in the MNP, highlighting the importance of freshwater conservation in this area in which the fish fauna is still poorly known.
Marcusenius wamuinii, une nouvelle espèce de Marcusenius à grandes écailles est décrite du Parc Marin des Mangroves (PMM), une zone protégée située dans l’embouchure du Bas Congo et ses environs en RD Congo. Elle se distingue de tous ses congénères sur la base de la combinaison unique des caractères suivants : 8 écailles circumpédonculaires, 27-31 rayons à la nageoire anale, 22-25 rayons à la nageoire dorsale, 19-22 écailles entre les nageoires dorsale et anale, 46-53 écailles en ligne latérale et un pédoncule caudal mince (hauteur 4.4-5.9 % SL). Son statut d’espèce distincte est également confirmé à base de résultats génétiques sur le gène mitochondrial cytochrome b. Ceci est la première nouvelle espèce de poisson découverte dans le PMM, soulignant l’importance de la conservation des eaux douces dans cette Zone, dont la faune de poissons est encore largement méconnue.

1 aDecru, Eva1 aSullivan, John, P1 aVreven, Emmanuel uhttps://www.researchgate.net/publication/333293882_Marcusenius_wamuinii_Teleostei_Mormyridae_a_new_elephantfish_from_the_Mangroves_National_Park_Democratic_Republic_of_the_Congo02730nas a2200121 4500008004100000022001400041245006700055210006600122260001600188520231400204100002802518856006202546 2019 eng d a0022-111200aElectroreception, electrogenesis and electric signal evolution0 aElectroreception electrogenesis and electric signal evolution cJun-03-20203 a

Electroreception, the capacity to detect external underwater electric fields with specialised receptors, is a phylogenetically widespread sensory modality in fishes and amphibians. In passive electroreception, a capacity possessed by c. 16% of fish species, an animal uses low‐frequency‐tuned ampullary electroreceptors to detect microvolt‐range bioelectric fields from prey, without the need to generate its own electric field. In active electroreception (electrolocation), which occurs only in the teleost lineages Mormyroidea and Gymnotiformes, an animal senses its surroundings by generating a weak (< 1 V) electric‐organ discharge (EOD) and detecting distortions in the EOD‐associated field using high‐frequency‐tuned tuberous electroreceptors. Tuberous electroreceptors also detect the EODs of neighbouring fishes, facilitating electrocommunication. Several other groups of elasmobranchs and teleosts generate weak (< 10 V) or strong (> 50 V) EODs that facilitate communication or predation, but not electrolocation. Approximately 1.5% of fish species possess electric organs. This review has two aims. First, to synthesise our knowledge of the functional biology and phylogenetic distribution of electroreception and electrogenesis in fishes, with a focus on freshwater taxa and with emphasis on the proximate (morphological, physiological and genetic) bases of EOD and electroreceptor diversity. Second, to describe the diversity, biogeography, ecology and electric signal diversity of the mormyroids and gymnotiforms and to explore the ultimate (evolutionary) bases of signal and receptor diversity in their convergent electrogenic–electrosensory systems. Four sets of potential drivers or moderators of signal diversity are discussed. First, selective forces of an abiotic (environmental) nature for optimal electrolocation and communication performance of the EOD. Second, selective forces of a biotic nature targeting the communication function of the EOD, including sexual selection, reproductive interference from syntopic heterospecifics and selection from eavesdropping predators. Third, non‐adaptive drift and, finally, phylogenetic inertia, which may arise from stabilising selection for optimal signal‐receptor matching.

1 aCrampton, William, G.R. uhttps://onlinelibrary.wiley.com/doi/abs/10.1111/jfb.1392203260nas a2200157 4500008004100000022001400041245012600055210006900181260001600250300001100266520262900277100002202906700001902928700002202947856013302969 2019 eng d a0006-897700aSensory Specializations of Mormyrid Fish Are Associated with Species Differences in Electric Signal Localization Behavior0 aSensory Specializations of Mormyrid Fish Are Associated with Spe cJan-03-2019 a1 - 173 a

The ability to localize communication signals plays a fundamental role in social interactions. For signal localization to take place, the sensory system of the receiver must extract information about distance and direction to the sender from physical characteristics of the signal. In many sensory systems, information from multiple peripheral receptors must be integrated by central sensory pathways to determine the sender location. Here, we asked whether evolutionary divergence in the electrosensory and visual systems of mormyrid fish is associated with signal localization behavior. In mormyrids, differences in the distribution of electroreceptors on the surface of the skin are associated with differences in the midbrain exterolateral nucleus (EL). Species with electroreceptors clustered in three rosettes on both sides of the head have a small and undifferentiated EL. In contrast, EL is enlarged and subdivided into anterior (ELa) and posterior (ELp) regions in species that have electroreceptors broadly ­distributed throughout the body. Interestingly, species with EL and clustered electroreceptors also have larger visual systems and higher visual acuity than species with ELa/ELp and broadly distributed electroreceptors. Species with broadly distributed electroreceptors and ELa/ELp approached a simulated conspecific by following the curved electric field lines generated by the electrosensory stimulus. In contrast, a species with small EL and clustered electroreceptors, but an enlarged visual system, followed shorter and straighter paths to the stimulus source. In the central electrosensory system, evoked field potentials in response to stimuli delivered from the left versus the right differed more in EL than in ELa/ELp. Our results suggest that signal localization behavior is associated with differences in sensory specializations. We propose that the distribution of electroreceptors on the body affects the ability of individuals to align parallel to electric field lines and maintain such alignment while approaching the signal source. The spatial resolution of sensory information relayed from the periphery to the midbrain in species with clustered electroreceptors may allow for gross, but not fine, processing of sender location. Furthermore, visual information may play an important role in localizing signaling individuals in species with small EL and clustered electroreceptors. In line with previous studies, we suggest that the physiological and behavioral differences associated with signal localization reflect adaptations to different habitats and social environments.

1 aVélez, Alejandro1 aRyoo, Da, Yeon1 aCarlson, Bruce, A uhttps://www.karger.com/Article/FullText/496493https://www.karger.com/Article/Pdf/496493https://www.karger.com/Article/Pdf/496493