Las fuentes de conocimiento de arquitectura militar en el Códice

This thesis comprises six research chapters (Chapters Two to Seven) with introductory (Chapter One) and general discussion (Chapter Eight) chapters. Each research chapter has been written in a publication format and represents a manuscript that is either published, in press or submitted. The publication status, journal authorship and authors’ contributions are detailed here. This format has resulted in some unavoidable repetition, particularly in relation to methods and materials. However, every effort has been made to limit duplication where appropriate. The aims of each chapter are as follows:

Chapter One: Introduces the present study and provides an overview of current relevant literature available on common dolphins world-wide. The context of the present study is detailed and the absence of appropriate data and/or knowledge within the literature is further highlighted.

Chapter Two: Investigates the genetic identity of the New Zealand common dolphin

population. Molecular methods were used to assess the taxonomic status and population structure of common dolphins sampled within New Zealand waters. Mitochondrial DNA was extracted from skin samples and 370 base pairs (bp) of the control region were compared with previously published sequences from other world-wide populations. Population structure within the New Zealand sample set was also examined based on three putative populations. This chapter is a reformatted version of a paper submitted to Journal of Evolutionary Biology, co-authored by A. Natoli, J. Pringle and D.M. Lambert. Skin samples from stranded and by-caught common dolphins within New Zealand waters were collected and catalogued by K.A. Stockin. Genetic samples were processed at the Allan Wilson Centre for Molecular Ecology and Evolution, Massey University by J. Pringle and K.A. Stockin. Data analyses were undertaken by K.A. Stockin and A. Natoli. The manuscript for this chapter was written by K.A. Stockin and improved by edits and suggestions provided by A. Natoli, N. Wiseman, D.M. Lambert and L. Mirimin.

Chapter Three: Examines occurrence and demography of common dolphins in the

Hauraki Gulf, New Zealand. Data were collected year-round during a three year study period using two independent observation platforms. Habitat use is examined in relation to environmental parameters, group dynamics and presence/absence of associated species. This chapter represents a reformatted version of a paper published in Aquatic Mammals, co-authored by G.J. Pierce, V. Binedell, N. Wiseman and M.B. Orams. Data for this chapter were primarily collected by K.A. Stockin during fieldwork conducted in the Hauraki Gulf between 2002 and 2005. Additional data provided by N. Wiseman, Dolphin Explorer crew and research assistants of the New Zealand Common Dolphin Project (NZCDP – Appendix 1.2) were also used in selective analyses. Assistance with General Additive Models (GAMs) was kindly provided by G.J.

Pierce. The manuscript for this chapter was written by K.A Stockin and improved by edits and suggestions provided by G.J. Pierce, N. Wiseman, M.B. Orams, I.N. Visser and D.H. Brunton.

Chapter Four: Provides insight into the behaviour of common dolphins in the Hauraki

Gulf using activity budgets. Behaviour is examined in relation to temporal and spatial scales. The influence of environmental parameters, group dynamics and associated species on common dolphin behaviour is also investigated. This chapter represents a reformatted version of a paper in press with Marine Mammal Science, co-authored by V. Binedell, N. Wiseman, D.H. Brunton and M.B. Orams. Data for this chapter were collected by K.A. Stockin during fieldwork conducted in the Hauraki Gulf between 2002 and 2005. The manuscript for this chapter was written by K.A Stockin and improved by edits and suggestions provided by V. Binedell, N. Wiseman, D.H Brunton, I.N. Visser and M.B. Orams.

Chapter Five: Details the diet of New Zealand common dolphins via stomach content

analyses. Here, the diet and feeding ecology of by-caught and stranded animals is assessed in relation to prey availability. Results are discussed in relation to fisheries interactions within New Zealand waters. This chapter represents a reformatted version of a paper published in New Zealand Journal of Marine and Freshwater Research, co-authored by L. Meynier, M.K.H. Bando and P.J. Duignan. Data for this chapter were primarily collected by K.A. Stockin and L. Meynier during necropsies undertaken by P.J. Duignan, K.A. Stockin, L. Meynier and M.K.H. Bando. Stomach content analyses were primarily undertaken by L. Meynier, with input from K.A. Stockin and M.K.H. Bando. The manuscript for this chapter was written by jointly by K.A Stockin and L. Meynier and improved by edits and suggestions provided by P.J. Duignan, N. Wiseman, D.H. Brunton, I.N. Visser and M.B. Orams.

Chapter Six: Investigates trace elements, PCB and OC pesticide levels observed in

common dolphins sampled within New Zealand waters. Results are compared with previously studied coastal species in order to quantify the cumulative risks posed to common dolphins from inshore pollution. This chapter represents a

reformatted version of a paper published in The Science of the Total Environment, co-authored by R.J. Law, P.J. Duignan, G.W. Jones, L. Porter, L. Mirimin, L. Meynier and M.B. Orams. Data for this chapter were primarily collected by K.A. Stockin during necropsies performed by P.J. Duignan, K.A. Stockin, L. Meynier and M.K.H. Bando. Tooth aging was conducted by G.W. Jones. Tissue samples were chemically processed at AgiQuality Ltd. Data were compiled and analyses undertaken by K.A. Stockin. Assistance with data interpretation were kindly provided by R.J Law. The manuscript for this chapter was written by K.A Stockin and improved by edits and suggestions provided by R. Law, P.J. Duignan, L. Porter and L. Meynier.

Chapter Seven: Examines the impacts associated with dolphin tourism in the Hauraki

Gulf. Markov-chain models were used to describe transition probabilities and activity budget in the presence/absence of a tour boat. The effect of boat interactions was quantified by comparing transition probabilities during control and impact scenarios. This chapter represents a reformatted version of a paper published in Marine Ecology Progress Series, co-authored by D. Lusseau, V. Binedell, N. Wiseman and M.B. Orams. Data for this chapter were primarily collected by K.A. Stockin during fieldwork conducted in the Hauraki Gulf between 2003 and 2005. Assistance with the interpretation of Markov chain transitions was kindly provided by V. Binedell and D. Lusseau. The manuscript for this chapter was written by K.A Stockin and improved by edits and suggestions provided by D. Lusseau, V. Binedell, N. Wiseman and M.B. Orams.

Chapter Eight: Concludes by summarising the presented findings of each research

chapter. The scientific relevance and management implications of the study are discussed and future research priorities identified.

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